Math, asked by mannat4343, 6 months ago

please help me please....​

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Answers

Answered by taniyath05
1

Answer:

-54 is the answer

Step-by-step explanation:

(-3xy)(7xy-5y²)

=-21x²y²+15xy³

when x=2 and y=1,

-21.2².1²+15.2.1³

=-21x4+15x2

=-84+30

=-54

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