Question

da pra me ajudar a resolver 2x²+12x+3= -7

Answer 1

2x²+12x+3+7=0
2x²+12x+10=0 (dividir por 2)
x²+6x+5=0
∆=6²-4.1.5
∆=36-20
∆=16
x=-6±√16/2.1
x1= -6+4/2=-2/2=-1
x2= -6-4/2=-10/2=-5