Evaluate
9b^{2}-4a^{2}
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9b^{2}-4a^{2}
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-4a^{2}-6ab+6ba+9b^{2}
Apply the distributive property by multiplying each term of 2a-3b by each term of -2a-3b.
-4a^{2}+9b^{2}
Combine -6ab and 6ba to get 0.
-4a^{2}-6ab+6ba+9b^{2}
Apply the distributive property by multiplying each term of 2a-3b by each term of -2a-3b.
-4a^{2}+9b^{2}
Combine -6ab and 6ba to get 0.
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