Question

$(9x^{2}-2{)}^{2}$
Gnt me ajudem por favor!!! agradeço​

Answer 1

Oie, tudo bom?

$= (9x {}^{2} - 2) {}^{2}$

$= (9x {}^{2} ) {}^{2} - 2 \: . \: 9x {}^{2} \: . \: 2 + 2 {}^{2}$

$\boxed{ = 81x {}^{4} - 36x {}^{2} + 4}$

Att. NLE Top Shotta