Question

b) x2 - 13x + 30 = 0
resolva por baskara​

Answer 1

x² - 13x + 30 = 0

a = 1 ; b = -13 ; c = 30

(-b ±√(b²-4ac)) / 2a

-(-13) ±√((-13)²-4(1)(30)) / 2(1)

13 ±√(169-120) / 2

(13 ±√49) / 2

(13 ±7) / 2

x₁ = (13+7)/2

x₁ = 10

x₂ =  (13-7)/2

x₂ =  3