Question

determine as raízes de x2-4x+4=0.
os coeficientes sao ?

Answer 1

Coeficientes: a= 1 b=-4 e c = 4

Delta = b² - 4.a.c
Delta = 16 - 16 = 0 

X' = $\frac{-b+ \sqrt{delta} }{2.a} = \frac{-(-4)+ \sqrt{0} }{2.1} = \frac{4}{2} = 2$