Question

$- 2 {x}^{2} - {x}^{2}$
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Answer 1

the answer should be

=-3x^2

Answer 2

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$- 2x {}^{2} - x {}^{2} \\ = > - x {}^{2} ( 2 + 1) \\ = > - 3x {}^{2}$
or direct ⤵⤵⤵⤵⤵

-3x² answer