Question

(__ - __ )2 = x2 – 18x + ___

Answer 1

Resposta:

x²-x=x-1

x²-x-x+1=0

x²-2x+1=0

-2+-√4-4x1x1 tudo dividido por 2x1=2

2+-0:2= x¹= 2:2=1. x²=2:2=1.