Question: Expand (p + 2)(p - 5)

Expanding - or geting rid of brackets. Make sure you multiply everything by everything! Correct: p² +2p -5p -10 = p² -3p -10     Wrong: p² + 2p -5 ...forgot that the -5 also needs to be multiplied by (p+2) Wrong: p² - 10 ...only multiplied the end bits    Wrong: p + 2p -5p -10 ... forgot that p x p = p²