Question

2x²-7x=15
equaçao do segundo grau

Answer 1

2x² - 7x - 15 = 0

∆ = b²-4ac
∆ = (-7)² - 4.2.(-15)
∆ = 49 + 120
∆ = 169

x' = -(-7)+√169/ 2.2 = 7+13/4 = 20/4 = 5

x'' = 7-13/4 = -3/2

S = -3/2 ; 5