Question

Решите уравнение:2x^2 + 3*x -5 = 0

Answer 1

2х²+3х-5=0
а=2 b=3 c=-5
D= b²-4ac= 3²-4*2*(-5)=9+40=49
√D=√49=7
x1= -b-√D/2a= -3-7/2*2=-10/4=-2.5
x2=-b+√D/2a=-3+7/2*2=4/4=1