Question

2- resolva as equação:

a, X.(X+2)=4X

b, (X-2)²+4X=4

Answer 1

a)X.(X+2)=4X
X²+2X=4X
X²+2x-4x=0
X²-2X=0
X(X-2)=0
X=0
X-2=0
X=2

b)(X-2)²+4X=4
(X-2).(X-2)+4X=4
X²-2x-2X+4X=4
X²-4X+4=4
X²-4X+4X+4=4
X²=4-4
X²=0
X=0