Question

Equação 2ºgrau
X²- 13X + 30 = 0

Answer 1

Δ = (-13)² - 4(1)(30)
Δ = 169 - 120
Δ = 49

x' = $\frac{13 +\sqrt{49}}{2(1)}$
x' = 10

x'' = $\frac{13 -\sqrt{49}}{2(1)}$
x'' = 3

As raízes são 10 e 3.