factorisation...
please solve these 5 sums
need urgently
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25). a^2-b^2-a^2+b^2......._ a^2-b^2-(a+b)^2.
(a+b)(a-b)-(a+b)^2
(a+b)[(a-b)-(a+b)].
(a+b)(a-b)-(a+b)^2
(a+b)[(a-b)-(a+b)].
tanishka36:
the answer is wrong
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