Chapter 5, Lesson 7


5-7.A understand addition of monomials
Which expression is equivalent to 2x2 — 3x2?
(a) —5x4 (b)x4
(c) —5x2 (d)x2

5-7.B understand multiplication of monomials
Which expression is equivalent to (4a2b3)(—3ab2c)?
(a)
—12a2b6c (b) —12a2b5c
(c) —12a3b6c (d) —12a3b5c

5-7.C understand multiplication by monomials
Find each product.
a. 5x2(2x2 + 3x — 4) b. —3yz(—3y + 2z)