Question

Efetue: A) (a^2 - 3)^2 B) (4a^2 - b^2)^2

Answer 1

Oie, Td Bom?!

A)

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

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

$= a {}^{4} - 6a {}^{2} + 9$

B)

$= (4a {}^{2} - b {}^{2} ) {}^{2}$

$= (4a {}^{2} ) {}^{2} - 2 \: . \: 4a {}^{2} b {}^{2} + (b {}^{2} ) {}^{2}$

$= 16a {}^{4} - 8a {}^{2} b {}^{2} + b {}^{4}$

Att. Makaveli1996