26-04-2016
Mathematics

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Explaining step by step the simplest form of the expression 9r(r+3)-2r(r-4)

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26-04-2016

For simplest form, the first thing you'll want to do is get rid of the parentheses:

9r(r + 3) - 2r(r - 4) = 9r^2 + 27r - 2r^2 + 8r

Now we want to combine like terms:

9r^2 + 27r - 2r^2 + 8r = 7r^2 + 35r

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