multiply (x - 3)(x - 3)
It's harder to show on the computer, but here:
(X - 3) (X - 3)
This methood is called distribution. First multiply the first X by each number in the second set of ( ). And because it's -3, the 3's are negative. I'm very color-cordinated, hope it helps you too.
X * X X^2 X squared
X * -3 -3X
Next multiply the second 3 by each number in the second set of ( )
-3 * X -3X
-3 * -3 9
X^2 -3X -3X +9
X^2 +9
the X^2 comes first in the equation. add the -3X 's. -3X+ -3X = -3X - 3X = 0
the two X's (without the squared) are the only ones in this that will even be added. And yes it can be a 0.
Answer: X^2 + 9