Question

-4x2+16=0
qual as raizes ?

Answer 1

Resposta:

x' = -2; x'' = 2

Explicação passo-a-passo:

Utilizando a formula de Bhaskara

Δ = $(0)^{2}$ - 4.(-4)(16)

Δ = 0 + 256

Δ = 256

x' = 0 + $\sqrt{256}$ / -8

x' = $\frac{16}{-8}$

x' = -2

x' = 0 - $\sqrt{256}$ / -8

x'' = $\frac{-16}{-8}$

x'' = 2

x' = -2; x'' = 2;