Question

How do you factor and solve `x^2=12x-27`?

Answer 1

3 and 9

Explanation:

`y = x^2 - 12x + 27`
Find 2 numbers, that have same sign (ac > 0), knowing their sum (b = -12) and their product (c = +27). They are: -3 and -9
y = (x - 3)(x - 9)
The 2 real roots are 3 and 9.