Question

calcule;

1)

a) ( x + 1) ² + ( x + 2)² - ( 2x + 1)

b) ( a² + b²) - 2. ( a.b)²

c) ( x + 2) . ( x +2 ) - ( x+2)² + ( x+2). ( x+3)

Answer 1

a) x² + 2x + 1 + $x^{2}$ + 4x + 4 - 2x - 1
2$x^{2}$ + 4x + 4

As outras letras eu não sei.