:-4xy +4xy2-4p +9 from 9xy +11xy2-9p -2
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Solution :-
Here,
We have to subtract,
-4xy+4xy²-4p+9 from 9xy+11xy²- 9p-2
Therefore,
= 9xy+11xy²-9p-2 - ( -4xy+4xy²- 4p + 9 )
= 9xy + 11xy² - 9p - 2 + 4xy - 4xy² + 4p-9
• Write the all like terms in correct order
= 9xy + 4xy + 11xy² - 4xy² - 9p + 4p -2 - 9
= 13xy + 11xy² - 4xy² - 9p + 4p - 2 - 9
= 13xy + 7xy² - 9p + 4p - 2 - 9
= 13xy + 7xy² - 5p -2 - 9
= 13xy + 7xy² - 5p - 11
Hence, 13xy + 7xy² - 5p - 11 is your answer mate 
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