Datrys 5x^2(x^3-4x^2+2x)-x(2x^4+6)-9(7x-5)

$$5 x ^ { 2 } ( x ^ { 3 } - 4 x ^ { 2 } + 2 x ) - x ( 2 x ^ { 4 } + 6 ) - 9 ( 7 x - 5 )$$

Enrhifo

$$3x^{5}-20x^{4}+10x^{3}-69x+45$$

Camau Ateb

Defnyddio’r briodwedd ddosbarthu i luosi 5x^{2} â x^{3}-4x^{2}+2x.

$$5x^{5}-20x^{4}+10x^{3}-x\left(2x^{4}+6\right)-9\left(7x-5\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi x â 2x^{4}+6.

$$5x^{5}-20x^{4}+10x^{3}-\left(2x^{5}+6x\right)-9\left(7x-5\right)$$

I ddod o hyd i wrthwyneb 2x^{5}+6x, dewch o hyd i wrthwyneb pob term.

$$5x^{5}-20x^{4}+10x^{3}-2x^{5}-6x-9\left(7x-5\right)$$

Cyfuno 5x^{5} a -2x^{5} i gael 3x^{5}.

$$3x^{5}-20x^{4}+10x^{3}-6x-9\left(7x-5\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi -9 â 7x-5.

$$3x^{5}-20x^{4}+10x^{3}-6x-63x+45$$

Cyfuno -6x a -63x i gael -69x.

$$3x^{5}-20x^{4}+10x^{3}-69x+45$$

Ehangu

$$3x^{5}-20x^{4}+10x^{3}-69x+45$$

Camau Ateb

Defnyddio’r briodwedd ddosbarthu i luosi 5x^{2} â x^{3}-4x^{2}+2x.

$$5x^{5}-20x^{4}+10x^{3}-x\left(2x^{4}+6\right)-9\left(7x-5\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi x â 2x^{4}+6.

$$5x^{5}-20x^{4}+10x^{3}-\left(2x^{5}+6x\right)-9\left(7x-5\right)$$

I ddod o hyd i wrthwyneb 2x^{5}+6x, dewch o hyd i wrthwyneb pob term.

$$5x^{5}-20x^{4}+10x^{3}-2x^{5}-6x-9\left(7x-5\right)$$

Cyfuno 5x^{5} a -2x^{5} i gael 3x^{5}.

$$3x^{5}-20x^{4}+10x^{3}-6x-9\left(7x-5\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi -9 â 7x-5.

$$3x^{5}-20x^{4}+10x^{3}-6x-63x+45$$

Cyfuno -6x a -63x i gael -69x.

$$3x^{5}-20x^{4}+10x^{3}-69x+45$$