Question

como fazer a equacao 7x-12=x²

Answer 1

7x-12=x²
-x²+7x-12=0
Delta=7²-4.(-1).(-12)
Delta=49-48
Delta=1
X=$\frac{-7+- \sqrt{1} }{2.(-1)}$
X¹=$\frac{-7+1}{-2}$=$\frac{-6}{-2} =3$
X²=$\frac{-7-1}{-2} = \frac{-8}{-2} =4$
S={2,3}