Evaluate
2\left(b^{2}-2ab-a^{2}\right)
Expand
2b^{2}-4ab-2a^{2}
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-a^{2}+b^{2}-2ab-a^{2}+b^{2}-2ab
To find the opposite of a^{2}-b^{2}+2ab, find the opposite of each term.
-a^{2}+2b^{2}-2ab-a^{2}-2ab
Combine b^{2} and b^{2} to get 2b^{2}.
-a^{2}+2b^{2}-4ab-a^{2}
Combine -2ab and -2ab to get -4ab.
-2a^{2}+2b^{2}-4ab
Combine -a^{2} and -a^{2} to get -2a^{2}.
-a^{2}+b^{2}-2ab-a^{2}+b^{2}-2ab
To find the opposite of a^{2}-b^{2}+2ab, find the opposite of each term.
-a^{2}+2b^{2}-2ab-a^{2}-2ab
Combine b^{2} and b^{2} to get 2b^{2}.
-a^{2}+2b^{2}-4ab-a^{2}
Combine -2ab and -2ab to get -4ab.
-2a^{2}+2b^{2}-4ab
Combine -a^{2} and -a^{2} to get -2a^{2}.
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