Решите уравнение 2x^2-5x-88=0

Question

Решите уравнение 2x^2-5x-88=0

Answer 1

D=25+704=729

Корень729=27

Х1=(5+27)/2*2=32/4=8

Х2=(5-27)/2*2=-22/4=-5,5

Answer 2

2x²-5x-88=0
D=b²-4ac=25-4×2×(-88)=√729=27
х1=-b+D/2a=5+27/4=8
x2=-b-D/2a=5-27/4=-5.5