Question

Gente pfvr me ajudem a resolver esses cálculos!!

1- ( a + b )² =

2- ( x + 2 )² =

3- ( x + y )² =

4- ( 7x + 8y)² =

5- ( a³ + b³ )²=

Pfvr me ajudem

Answer 1

Explicação passo-a-passo:

1)

(a + b)² = a² + 2.a.b + b²

(a + b)² = a² + 2ab + b²

2)

(x + 2)² = x² + 2.x.2 + 2²

(x + 2)² = x² + 4x + 4

c)

(x + y)² = x² + 2.x.y + y²

(x + y)² = x² + 2xy + y²

d)

(7x + 8y)² = (7x)² + 2.7x.8y + (8y)²

(7x + 8y)² = 49x² + 112xy + 64y²

e)

(a³ + b³)² = (a³)² + 2.a³.b³ + (b³)²

(a³ + b³)² = a⁶ + 2a³b³ + b⁶