fill in the blank with a constant, so that the resulting quadratic expression is the square of a binomial. x^2 + 22x + 8x =_____
Simplify as
x^2 + 30x + _____
Take 1/2 of 30 =15
Square it = 225 is the constant we need
(x +15)^2 = x^2 + 30x + 225
