Question

10.Desenvolva
(–3a)²

a)2a²
b)189a²
c)153a²
d)9a²​​

Answer 1

$( - 3a) {}^{2} = ( - 3a) \times ( - 3a) = {9a}^{2}$

Answer 2

Oie, Td Bom?!

• Resposta: Opção D.

$= ( - 3a) {}^{2}$

$= ( - 3) {}^{2} \: . \: a {}^{2}$

$= 9a {}^{2}$

Att. Makaveli1996