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| Math Central | Quandaries & Queries |
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Question from ana, a student: (5xy)^5 |
Hi Ana,
(5xy)5 = (5xy)(5xy)(5xy)(5xy)(5xy)
Since multiplication is commutative (a times b is equal to b times a) this can be written
(5xy)(5xy)(5xy)(5xy)(5xy)
= (5 × 5 × 5 × 5 × 5)(x × x × x × x × x)(y × y × y × y × y )
= 55 x5 y5.
Penny
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