Question

ײ-8×+7=0
equação de 2 grau ​

Answer 1

Bháskara.

Δ = b² - 4ac

Δ = -8² - 4.1.7

Δ = 64 - 28

Δ = 36

-b ± $\sqrt{36}$ / 2a

-(-8) ± 6 / 2.1

8 ± 6 / 2

x' = 8+6/2 = 7

x" = 8-6/2 = 2

x = {7;2}