Question

Me ajuda aí gente pfv

Answer 1

Resposta:

amg,usa o App fotomatch ele resolve qualquer conta e mostra qual tá certa

Answer 2

Resposta:

Explicação passo a passo:

$a)$

$2.(x-8) =$

$2.(12-8)=$

$2.4=8$

$b)$

$3x+x^{3} =$

$3.4+4^{3}=$

$12+64=76$

$c)$

$x^{3} -x^{2} -2x=$

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

$-8-(+4)+4=$

$-8-4+4=$

$-12+4=-8$

$d)$

$3x+\frac{x}{4} -y=$

$3.4+\frac{4}{4} -5=$

$12+1-5=$

$13-5=8$

$e)$

$5.(2x-3)=$

$5.(2.4-3)=$

$5.(8-3)=$

$5.5=25$

$f)$

$x^{3} -x^{2} +5=$

$3^{3}-3^{2} +5=$

$27-9+5=$

$18+5=23$