Datrys x^2-(x-1)^2

$$x ^ { 2 } - ( x - 1 ) ^ { 2 }$$

Enrhifo

$$2x-1$$

Camau Ateb

Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(x-1\right)^{2}.

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

I ddod o hyd i wrthwyneb x^{2}-2x+1, dewch o hyd i wrthwyneb pob term.

$$x^{2}-x^{2}+2x-1$$

Cyfuno x^{2} a -x^{2} i gael 0.

$$2x-1$$

Ehangu

$$2x-1$$

Camau Ateb

Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(x-1\right)^{2}.

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

I ddod o hyd i wrthwyneb x^{2}-2x+1, dewch o hyd i wrthwyneb pob term.

$$x^{2}-x^{2}+2x-1$$

Cyfuno x^{2} a -x^{2} i gael 0.

$$2x-1$$