Question

X elevado a 2 menos 8 mais 12 igual a zero

Answer 1

x^2-8x+12=0
delta=b^2-4ac
delta=(-8)^2-4.1.12
delta=64-48
delta=16
x=-b-/+ raiz de delta/2a
x=-(-8)-4/2.1
x=8-4/2
x=4/2
x=2
x=-(-8)+4/2.1
x=8+4/2
x=12/2
x=6
S={2, 6}