Question

a²+4a+4=0 qual a resposta?

Answer 1

a² + 4a + 4 = 0

a = 1;
b = 4
c = 4

Δ = b²  - 4ac
Δ = 4² - 4.1.4
Δ = 16 - 16
Δ = 0 (uma raiz)

x = - b +/- √Δ
            2a

x = - 4
       2

x = - 2