This is similar to Problem 2 from your Section 4.4 worksheet.

Factor.

$9 x^2 + 9 x-108=\big($ $\big) \big($ $\big) \big($ $\big)$ (Note: The constant factor MUST be the first factor.)

$x^2+9 xy + 18 y^2 = \big($ $\big) \big($ $\big)$

$m^2p^2-15 mp+56 = \big($ $\big) \big($ $\big)$

Hint: