Question

Qual seria a resposta certa ?

Answer 1

{√[20+(√x-100)]} ² = (-5) ²

20 + √(x-100) = 25

√(x-100) = 25-20 = 5

[ √(x-100)] ² = (5) ²

x - 100 = 25

x = 125

Resposta: E)