Question

7. Desenvolva:
a) (-x + 6)2
b) (-5x - 2)2​

Answer 1

Oie, Td Bom?!

a)

$= ( - x + 6) {}^{2}$

$= (6 - x) {}^{2}$

$= 6 {}^{2} - 2 \: . \: 6x + x {}^{2}$

$= 36 - 12x + x {}^{2}$

$= x {}^{2} - 12x + 36$

b)

$= ( - 5x - 2) {}^{2}$

$= ( - 5x) {}^{2} - 2 \: . \: ( - 5)x \: . \: 2 +2 {}^{2}$

$= 25x {}^{2} + 20x + 4$

Att. Makaveli1996