Question

- x2 +x + 12=0

urgente !!!

Answer 1

Explicação passo-a-passo:

∆=b2-4ac

∆=1(2)-4 . -1 .12

∆=1+48

∆=49

x=-b+/-√∆ /2a

x=-1+/-√49 /2 . -1

x=-1+/-7 /-2

x1=-1+7 /-2

x1=6/-2

x1=-3

x2=-1- 7 /-2

x2=-8/-2

x2=4