Question

2х в квадрате + 7х + 5 =0

Answer 1

2х² + 7х + 5 = 0,
Д = 7² - 4*2*5 = 49 - 40 = 9,
х1 = (-7 + 3) / 2*2 = -4 / 4 = -1,
х2 = (-7 - 3) / 2*2 = -10 / 4 = -2,5

Answer 2

2x^2+7x+5=0
D=b^2-4ac=49-40=9
x1=-7+√D/4=-7+3/4=-4/4=-1
x2=-7-3/4=-10/4=-2,5