Question

quais são as raizes da equação 2x^2-15-x=0

Answer 1

2x²-15-x = 0
Δ = (-1)² - 4.(-15).2
Δ = 1+120
Δ = 121

x¹ = -(-1) +√121 / 2.2 = 1+11/4 = 12/4 = 3
x² = 1-11/4 = -10/4