Question

X²-4X+4=0 RESOLVA A EQUAÇAO

Answer 1

x² -4x + 4 = 0

a = 1
b = -4
c = 4

Δ=b²-4ac
Δ=(-4)² - 4 . 1 . 4
Δ= 16 - 16
Δ= 0 
-------------------------
x= -b+-√Δ/2a
x= -(-4)+- 0/2
x = 4 +- 0 /2
x'= 4+0/2                 x''= 4-0/2
x'=4/2                      x''=4/2
x'=2                         x''=2