Question

Calcule
${(x - 1)}^{2}$
​

Answer 1

Resposta:

(x+1)²+(x-1)²+2(x+1)(x-1)=

(x+1)(x+1)+(x-1)+(x-1)+2(x+1)(x-1)=

x²+x+x+1+x²-x-x+1+2(x²-1)=

2x²+2+2x²-2=

4x²