Question
Subtract:
What must be subtracted from $3 a^2-6 a b-3 b^2-1$ to get $4 a^2-7 a b-4 b^2+1$ ?
What must be subtracted from $3 a^2-6 a b-3 b^2-1$ to get $4 a^2-7 a b-4 b^2+1$ ?
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Answer
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