Question

-x²+x+12=O alguem ai ?

Answer 1

a=-1, b=1 e c=12

b^2-4ac
1 -4.(-1).12
1+48
 49

x1=-1 +7 /-2= -3
x1=-1-7 / -2= 3

Answer 2

Δ=b²-4ac

Δ=(1) -4 .(-1).(12)

Δ=48+1

Δ=49

x1=-b²+RaizΔ/2a
x1=-1+7/-2
x1=6/-2
x1=-3

x2=-b²-RaizΔ/2a
x2=-1-7/-2
x2=-8/-2
x2=4

S= {-3;4}