subtract the following: a)  3a+4b-5ab  from  4a+2ab-2b   b)  -11a2b2+7ab-6 from 9a2b2-6ab+9

a) 
=> 3a+4b-5ab-4a+2ab-2b
= (3a-4a)+(4b-2b)+(-5ab+2ab)
= -a +2b-3ab

 
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pls solve b) also    many many thanks  parinika.
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Bokachoda
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3A + 4 Y - 5 baby from 4A + 2 AV - 2B
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