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Question from cookie, a student:

(2.50x^-3) - (3.0x^-1)
please show me how to do this. The answer in the book is 7.5 x ^-4

Hi Cookie,

There is an error in the statement of the problem, it should be

simplify (2.50x-3) x (3.0x-1)

Can you do it now?
Penny

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