Question

calcule o valor da expressão (x+1)²+(x-1)²????
por favor ​

Answer 1

Oie, Td Bom?!

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

$= x {}^{2} + 2x \: . \: 1 + 1 {}^{2} + x {}^{2} - 2x \: . \: 1 + 1 {}^{2}$

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

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

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

$= 2x {}^{2} + 2$

Att. Makaveli1996