Question

X elevado a 2 -3x-10= 0?

Answer 1

Resposta:

x² - 3x - 10 = 0

Usando a fórmula de Bháskara:

-b ± $\sqrt{b^{2} - 4.a.c }$ ÷ 2.a

3 ± $\sqrt{3^{2} - 4.1.(-10)}$ ÷ 2.1

3 ± $\sqrt{9 + 40}$ ÷ 2

3 ± $\sqrt{49}$ ÷ 2

(3 ± 7) ÷ 2

(3 + 7) ÷ 2 = 10 ÷ 2 = 5

(3 - 7) ÷ 2 = -4 ÷ 2 = -2

{-2, 5}