## QUICK REVIEW 1.1 (For help, go to Section A.2.)
Exercise numbers with a gray background indicate problems that the authors have designed to be solved without a calculator.
Factor the following expressions completely over the real numbers.
(1) x2−16
(2) x2+10x+25
(3) 81y2−4
(4) 3x3−15x2+18x
(5) 16h4−81
(6) x2+2xh+h2
(7) x2+3x−4
(8) x2−3x+4
(9) 2x2−11x+5
(10) x4+x2−20