Question

Alguem sabe??
A letra d nao consegui entender

Answer 1

Resposta:

b)

(1/(x+2))² =1/(x+2)² =1/(x²+2x+4)

d)

(a/(b+c))⁻² =((b+c)/a)² =(b+c)²/a² =(b²+2bc+c²)/a²