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01-06-2017
Mathematics

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fifteen times the square of a non-zero number is equal to 20 times the number.

Respuesta :

01-06-2017

The square of a number is n^2. So

15n^2=20n subtract 20n from both sides

15n^2-20n=0 factor our 5n

5n(3n-4)=0, since we are told that n does not equal zero...

3n-4=0

3n=4

n=4/3

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