what must be subtracted from 3a²-6ab-3b²-1 to get 4a²-7ab-4b²+1
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answer is 7a^2-13ab-7b^2
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satish101:
Ans is 7a^2-13ab-7b^2-2
it is +2 not - 2
How 7asq ??? When 4 a sq come to this side it behaves positive...
Sorry neg...
yup
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