Question

resolva a equação x² - 4x +4 = 0

Answer 1

x² - 4x + 4 = 0
(x-2) (x-2) =0
x-2 = 0
X1= x2= 2

Answer 2

x'=(4+√∆)/2.1
x'=4+0/2
x'=2
e
x"=(4-√∆)/2.1
x"=4-0/2
x"=2

portanto x=2