Question

Решите срочно плиз 2x^2+7x-9=0

Answer 1

 2x^2+7x-9=0
D=7^2+4*2*9=49+72=121=11^2
x1=-7-11/2*2=-18/4=4,5
х2=-7+11/2*2=1

Answer 2

2x^2+7x-9=0

D=7^2-4*2*(-9)=121

x1=-7+11/4=1

x2=-7-11/4=-4.5