15. Find (3 xy + 4y)2 - (3 xy - 4y)2
9xy2
48xy?
4 xy
5 xy
please give me soon
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Step-by-step explanation:
a^2 - b^2 = (a+b)(a-b)
a=3xy+4y and b=3xy-4y
=> (3xy+4y + 3xy-4y)(3xy+4y - 3xy+4y)
(6xy)(8y)
48xy^2
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