Question
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$2 x^2,-3 x^2, 7 x^2$
$2 x^2,-3 x^2, 7 x^2$
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Answer
$=2 x^2+\left(-3 x^2\right)+7 x^2 $
$ =9 x^2-3 x^2=6 x^2 $
$ =9 x^2-3 x^2=6 x^2 $
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