Resol (x+1)^2(x-(1-3i))(x-(1+3i))

$$( x + 1 ) ^ { 2 } ( x - ( 1 - 3 i ) ) ( x - ( 1 + 3 i ) )$$

Calcula

$$\left(x+\left(-1-3i\right)\right)\left(x+\left(-1+3i\right)\right)\left(x+1\right)^{2}$$

Passos de solució

Utilitzeu el teorema del binomi \left(a+b\right)^{2}=a^{2}+2ab+b^{2} per desenvolupar \left(x+1\right)^{2}.

$$\left(x^{2}+2x+1\right)\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar x^{2}+2x+1 per x-\left(1-3i\right).

$$\left(x^{2}\left(x-\left(1-3i\right)\right)+2x\left(x-\left(1-3i\right)\right)+x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar x^{2}\left(x-\left(1-3i\right)\right)+2x\left(x-\left(1-3i\right)\right)+x-\left(1-3i\right) per x-\left(1+3i\right).

$$x^{2}\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)+2x\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Multipliqueu -1 per 1-3i per obtenir -1+3i.

$$x^{2}\left(x+\left(-1+3i\right)\right)\left(x-\left(1+3i\right)\right)+2x\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Multipliqueu -1 per 1+3i per obtenir -1-3i.

$$x^{2}\left(x+\left(-1+3i\right)\right)\left(x+\left(-1-3i\right)\right)+2x\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar x^{2} per x+\left(-1+3i\right).

$$\left(x^{3}+\left(-1+3i\right)x^{2}\right)\left(x+\left(-1-3i\right)\right)+2x\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar x^{3}+\left(-1+3i\right)x^{2} per x+\left(-1-3i\right) i combinar-los com termes.

$$x^{4}-2x^{3}+10x^{2}+2x\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Multipliqueu -1 per 1-3i per obtenir -1+3i.

$$x^{4}-2x^{3}+10x^{2}+2x\left(x+\left(-1+3i\right)\right)\left(x-\left(1+3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Multipliqueu -1 per 1+3i per obtenir -1-3i.

$$x^{4}-2x^{3}+10x^{2}+2x\left(x+\left(-1+3i\right)\right)\left(x+\left(-1-3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar 2x per x+\left(-1+3i\right).

$$x^{4}-2x^{3}+10x^{2}+\left(2x^{2}+\left(-2+6i\right)x\right)\left(x+\left(-1-3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar 2x^{2}+\left(-2+6i\right)x per x+\left(-1-3i\right) i combinar-los com termes.

$$x^{4}-2x^{3}+10x^{2}+2x^{3}-4x^{2}+20x+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Combineu -2x^{3} i 2x^{3} per obtenir 0.

$$x^{4}+10x^{2}-4x^{2}+20x+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Combineu 10x^{2} i -4x^{2} per obtenir 6x^{2}.

$$x^{4}+6x^{2}+20x+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Multipliqueu -1 per 1-3i per obtenir -1+3i.

$$x^{4}+6x^{2}+20x+\left(x+\left(-1+3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Multipliqueu -1 per 1+3i per obtenir -1-3i.

$$x^{4}+6x^{2}+20x+\left(x+\left(-1+3i\right)\right)\left(x+\left(-1-3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar x+\left(-1+3i\right) per x+\left(-1-3i\right) i combinar-los com termes.

$$x^{4}+6x^{2}+20x+x^{2}-2x+10$$

Combineu 6x^{2} i x^{2} per obtenir 7x^{2}.

$$x^{4}+7x^{2}+20x-2x+10$$

Combineu 20x i -2x per obtenir 18x.

$$x^{4}+7x^{2}+18x+10$$

Expandiu

$$x^{4}+7x^{2}+18x+10$$

Passos de solució

Utilitzeu el teorema del binomi \left(a+b\right)^{2}=a^{2}+2ab+b^{2} per desenvolupar \left(x+1\right)^{2}.

$$\left(x^{2}+2x+1\right)\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar x^{2}+2x+1 per x-\left(1-3i\right).

$$\left(x^{2}\left(x-\left(1-3i\right)\right)+2x\left(x-\left(1-3i\right)\right)+x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar x^{2}\left(x-\left(1-3i\right)\right)+2x\left(x-\left(1-3i\right)\right)+x-\left(1-3i\right) per x-\left(1+3i\right).

$$x^{2}\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)+2x\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Multipliqueu -1 per 1-3i per obtenir -1+3i.

$$x^{2}\left(x+\left(-1+3i\right)\right)\left(x-\left(1+3i\right)\right)+2x\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Multipliqueu -1 per 1+3i per obtenir -1-3i.

$$x^{2}\left(x+\left(-1+3i\right)\right)\left(x+\left(-1-3i\right)\right)+2x\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar x^{2} per x+\left(-1+3i\right).

$$\left(x^{3}+\left(-1+3i\right)x^{2}\right)\left(x+\left(-1-3i\right)\right)+2x\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar x^{3}+\left(-1+3i\right)x^{2} per x+\left(-1-3i\right) i combinar-los com termes.

$$x^{4}-2x^{3}+10x^{2}+2x\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Multipliqueu -1 per 1-3i per obtenir -1+3i.

$$x^{4}-2x^{3}+10x^{2}+2x\left(x+\left(-1+3i\right)\right)\left(x-\left(1+3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Multipliqueu -1 per 1+3i per obtenir -1-3i.

$$x^{4}-2x^{3}+10x^{2}+2x\left(x+\left(-1+3i\right)\right)\left(x+\left(-1-3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar 2x per x+\left(-1+3i\right).

$$x^{4}-2x^{3}+10x^{2}+\left(2x^{2}+\left(-2+6i\right)x\right)\left(x+\left(-1-3i\right)\right)+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar 2x^{2}+\left(-2+6i\right)x per x+\left(-1-3i\right) i combinar-los com termes.

$$x^{4}-2x^{3}+10x^{2}+2x^{3}-4x^{2}+20x+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Combineu -2x^{3} i 2x^{3} per obtenir 0.

$$x^{4}+10x^{2}-4x^{2}+20x+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Combineu 10x^{2} i -4x^{2} per obtenir 6x^{2}.

$$x^{4}+6x^{2}+20x+\left(x-\left(1-3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Multipliqueu -1 per 1-3i per obtenir -1+3i.

$$x^{4}+6x^{2}+20x+\left(x+\left(-1+3i\right)\right)\left(x-\left(1+3i\right)\right)$$

Multipliqueu -1 per 1+3i per obtenir -1-3i.

$$x^{4}+6x^{2}+20x+\left(x+\left(-1+3i\right)\right)\left(x+\left(-1-3i\right)\right)$$

Utilitzeu la propietat distributiva per multiplicar x+\left(-1+3i\right) per x+\left(-1-3i\right) i combinar-los com termes.

$$x^{4}+6x^{2}+20x+x^{2}-2x+10$$

Combineu 6x^{2} i x^{2} per obtenir 7x^{2}.

$$x^{4}+7x^{2}+20x-2x+10$$

Combineu 20x i -2x per obtenir 18x.

$$x^{4}+7x^{2}+18x+10$$