Given: (x+3)^2
Expand the given
(x+3)^2 → (x+3)(x+3)
Do the FOIL method
(x+3)(x+3)
= (x)(x) + (3)(x) + (3)(x) + (3)(3)
Simplify
= x^2 + 3x + 3x + 9
= x^2 + 6x + 9
Therefore, (x+3)^2 is equal to x^2 + 6x + 9
