Question
Simplify: $7n^2 – 9n^2 + 3n^2$
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Answer
$7n^2 – 9n^2 + 3n^2$
$= 7n^2 + 3n^2 – 9n^2$
$= 10n^2 - 9n^2 = n^2$
$= 7n^2 + 3n^2 – 9n^2$
$= 10n^2 - 9n^2 = n^2$
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