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

Factor.

$x^2+15 x +56= \big($ $\big) \big($ $\big)$

$x^2-1 x - 20 = \big($ $\big) \big($ $\big)$

$x^2+14 x + 48 = \big($ $\big) \big($ $\big)$

Hint: