Question

X ao quadrado menos x menos 12 = 0

Answer 1

x^2-x-12=0
delta=b^2-4ac
delta=(-1)^2-4.1.(-12)
delta=1+48
delta=49
x=-b-/+ raiz de delta/2a
x=-(-1)-7/2.1
x=1-7/2
x=-6/2
x=-3
x=-(-1)+7/2.1
x=1+7/2
x=8/2
x=4

Answer 2

Resposta:

A=1. B= -1. C=-12

delta=-1^2 -4.1.-12

delta=-1-48

delta=49

x=-(-1) +- 7/2.1

x'=-(-1)-7/2.1

x=1-7/2

x=-6/2

x=-3

x"=-(-1)+7/2.1

x=1+7/2

x=8/2

x=4