Question 1166397
x^2-4x=12, start by moving the constant.
take half of the b (bx), square it and add to both sides
x^2-4x+4=12+4
factor
(x-2)^2=16
take the square root of both sides
x-2=+/-4
move the constant
x=2+/-4
x=-2, 6
{{{graph(300,300,-10,10,-10,10,x^2-4x-12)}}}