n^2 - 2n/n^2 - 7n=?
Simplify the expression.
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(n2-2n)/(n2-7n) = ? Notice that n can be factored out of the numerator & denominator
The problem becomes [n(n-2)]/[n(n-7)] and you can cancel the n's since they are factors (multiplying) and the final answer is (n-2)/(n-7)