Question

a) (x)^2 + 20= 36

b) (x)^3 + 15= 42

c) x+8=28-1x

Alguém me ajuda?

Answer 1

a)36-20
=16 √16= 4

b)42-15
=27 ³√ 27= 3

c)2x= 20
x= 20/2
x= 10

Answer 2

x^2+20=36
x^2=36-20
x^2=16
x= raiz Quad de 16
x=4

x^3+15=42
x^3=42-15
x^3=27
x= raiz Cub de 27
x=3

x+8=28-1x
x+x=28-8
2x=20
x=20/2
x=10