Question

Resolva as expressões abaixo
A) (×+2)²:
B) (×-8)²:
C) (y-3).(y+3):
D) 2a+2c-2b:

Answer 1

Resposta :

$A ) 2^2=4\\Passos \\\\2^2\\\\2^2=4 \\=4$

$B ) \left(\times \left(-8\right)\right)^2=64\\\\Passos\\\left(-8\right)^2\\\\\left(-8\right)=-8\\=\left(-8\right)^2\\\\\left(-8\right)^2=8^2\\\\=8^2\\\\8^2=64\\\\=64$

$C ) \mathrm{:}\left(y-3\right)\left(y+3\right):\quad y^2-9\\\\=y^2-3^2\\\\3^2=9\\\\=y^2-9$

$D ) 2a+2c-2b:\quad 2\left(a+c-b\right)\\\\\passos \\\\\2a+2c-2b:\quad 2\left(a+c-b\right)\\\\=2\left(a+c-b\right)$

espero ter ajudado !