slove it this by factorise
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Answer:
given
=>(x+y)³-(x³+y³)=0
=>x³+3x²y+3xy²+y³-x³-y³=0
=>3x²y+3xy²=0
take 3xy as common
=> 3xy(x+y)=0
=>3xy=0
here is your answer
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