Recall that the product (a + b)(a - b) is the
difference of squares, a? - b2.
Examine this same product for radical
expressions.
Choose the product of
(3+7)(3-7)
6-3+39-194
9- 21+ 21 - 49
9-3 7+3 7 - 149

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.