Answers

2015-02-22T20:19:21+05:30
5a²b-5ab²-13a²b-13ab²
= -8a²b-18b²a= -2ab(4a+9b)
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is that the ans.?
dont know i am asking you for the answer right?
ya ya,it's the ans.
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2015-02-22T20:20:56+05:30
Here,
5ab(a-b) - 13ab(a+b)
= (5a^2b -  5ab^2) - (13a^2b + 13ab^2 )
= 5a^2b -  5ab^2 - 13a^2b - 13ab^2
= -8a^2b -18ab^2
= -2ab(4a + 9b)
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