Question

Me ajudem!!! 2x²-7x-15=0

Answer 1

Formula de Bhaskara
Δ = b² - 4.a.c
x = -b +- √Δ / 2.a

2x² - 7x - 15 = 0
Δ = (-7)² -  4.2.(-15)
Δ = 49 + 120
Δ = 169

x = 7 +- √169 / 2.2
x = 7 +- 13 / 4

x1 = 7 - 13 / 4
x1 = -6 / 4
x1 =  -1,5

x2 = 7 + 13 / 4
x2 = 20 / 4
x2 = 5