Question

quanto é x² + 3x - 6 = -8

Answer 1

"^"=elevado "/"=dividido por
x^2+3x-6=-8
x^2+3x-6+8=0
x^1+3x+2=0
∆=b^2-4ac
∆=3^2-4(1)(2)
∆=9-8
∆=1
√∆=1
x=-b±√∆/2a
x=-(3)±1/2(1)
x=-3+1/2
x'=-2/2
[x'=-1]
x''=-3-1/2
x''=-4/2
[x''=-2]
v={-1, -2}