Question

2$x^{2}$+7x-8=0

Answer 1

2+7x-8=0
7x=8-2
7x=6
x=67
-------------------------------------------
2x^2 + 7x - 8 =0
д= 49 + 4*2*8 = 49+64= 113
X1,2= (-7 +- корень из 113) 4
========================

Answer 2

найдите дискриминант