Question

-2x²-2x+12=0


ME AJUDEM ​

Answer 1

Resposta:

-x²+x+12=0

x²-x-12=0

∆=(-1)²-4×1×(-12)

∆=1+48

∆=49

X=-(-1)±√49 / 2

X= 1±7 /2

X' 1+7 /2 = 8/2 = 4

X" 1-7 /2= -6/2= -3