Problem

Simplify each expression. See Example.Concept CheckDecide whether each expression has been...

Simplify each expression. See Example.

Concept CheckDecide whether each expression has been simplified correctly. If not, correct it. Assume all variables represent nonzero real numbers.

(a) (mn)2 = mn2
(b) y2 · y5 = y7
(c)
(d) 30y =0
(e) 45 · 42 = 167
(f) (a2)3 = a5
(g) cd0=1
(h) (2b)4 =8b4

EXAMPLE Using the product Rule

Find each product.

(a) y4 · y7
(b) (6z5)(9z3)(2z2)

SOLUTION

(a) y4 · y7 = y4+7 =y11 Product rule: Keep the base and add the exponents.
(b)

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Solutions For Problems in Chapter R.3

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