## Intermediate Algebra (6th Edition)

$(y + 2)^{2}$ - 25 = $y^{2}$ + 4y + 4 - 25 = $y^{2}$ + 4y - 21 = (y + 7)(y - 3) Check by multiplying factors with FOIL: y(y) + y(-3) + 7(y) + 7(-3) = $y^{2}$ - 3y + 7y - 21 = $y^{2}$ + 4y - 21