Question

1) Resolva as equações:
a) x²=81
b)√x=3
c)√y=7
d)√z=4
e)√x=2

Answer 1

a) x² = 81
x = √81
x = ±9

b) √x = 3
x = 3²
x = 9


c) √y = 7
y = 7²
y = 49

d) √z = 4
z = 4²
z = 16

e)√x = 2
x = 2²
x = 4


att: Jhonny ♥