Question

2x² = -12x - 18??????????????

Answer 1

2x²= -12x-18
2x²+12x+18= 0

a= 2, b= 12, c= 18
_______________________________________________
Δ= b²-4.a.c

Δ= 12²-4.2.18
Δ= 144-144
Δ= 0

x= (-b±√Δ)/2.a                             x= (-12±√0)/4

x'= -12/4= -3


Forte abraço!

Answer 2

2x²+12x+18=0
Δ=b-4.a.c
Δ=12²-4.2.18
Δ=144-144
Δ=0

x=-b±√Δ/2.a
x=-12±√0/2.2
x=-12±0/4
x'=-12+0/4=-12/4=-3
x"=-12-0/4=-12/4=-3

x'=x"=-3