Question

Resolva a equação do 2° grau por Bháscara e marque a resposta correta:

4x² - 8x + 4 = 0



a) x = 1
b) x = - 1 e x = 1
c) x = Não possuí raiz real
d) NDA ( Nenhuma das respostas anteriores)

Answer 1

$\boxed{\begin{array}{lr} 4x^2-8x+4=0 \end{array}}$

a = 4

b = -8

c = 4

$\boxed{\begin{array}{lr} \Delta=(-8)^2-4.4.4\\\Delta=64-64\\\Delta=0 \end{array}}$

$\boxed{\begin{array}{lr} x=\dfrac{8\pm0}{2.a}\\\\\\x=\dfrac{8}{8}\\\\\\x=1 \end{array}}$