Question

Calcule As Potências : (7x)²
(-5a³)²
(7x²y³z)2
Ajudem por favor.

Answer 1

$(7x) {}^{2} = 7 {}^{2} x {}^{2} = 49x {}^{2}$
$( - 5a {}^{3}) {}^{2} = ( - 5) {}^{2} \times (a {}^{3} ) {}^{2} = 25a {}^{6}$
$(7x {}^{2} y {}^{3} z)2 = 7x {}^{2} y {}^{3} z \times 2 = 14x {}^{2} y {}^{3} z$