Issolvi left(x^2+x-1right)left(2x^3-5x+8right)--(18x+5

$$\left( { x }^{ 2 } +x-1 \right) \left( 2 { x }^{ 3 } -5x+8 \right) --(18x+5$$

Evalwa

$$\left(x^{2}+x-1\right)\left(2x^{3}-5x+8\right)+18x+5$$

Passi tas-Soluzzjonijiet

Uża l-propjetà distributtiva biex timmultiplika x^{2}+x-1 b'2x^{3}-5x+8 u kkombina termini simili.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+13x-8-\left(-\left(18x+5\right)\right)$$

Biex issib l-oppost ta' 18x+5, sib l-oppost ta' kull terminu.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+13x-8-\left(-18x-5\right)$$

Biex issib l-oppost ta' -18x-5, sib l-oppost ta' kull terminu.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+13x-8+18x+5$$

Ikkombina 13x u 18x biex tikseb 31x.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+31x-8+5$$

Żid -8 u 5 biex tikseb -3.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+31x-3$$

Espandi

$$2x^{5}+2x^{4}-7x^{3}+3x^{2}+31x-3$$

Passi tas-Soluzzjonijiet

Uża l-propjetà distributtiva biex timmultiplika x^{2}+x-1 b'2x^{3}-5x+8 u kkombina termini simili.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+13x-8-\left(-\left(18x+5\right)\right)$$

Biex issib l-oppost ta' 18x+5, sib l-oppost ta' kull terminu.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+13x-8-\left(-18x-5\right)$$

Biex issib l-oppost ta' -18x-5, sib l-oppost ta' kull terminu.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+13x-8+18x+5$$

Ikkombina 13x u 18x biex tikseb 31x.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+31x-8+5$$

Żid -8 u 5 biex tikseb -3.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+31x-3$$