please answer of this question to me
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Answer:
(1): (a+b)²+(a-b)²
=> (a)²+2ab+(b)²
=>a²+2ab+b²
(2): (3x+7y)-(3x-7y)
=>(a)²-2ab+(b)²
=>( 3x)²-2×3x×7y+(7y)²
=> 9x²-42xy+14y²
=>-42xy+(9x²+14y²)
=> -42xy+23x²y²
=> -19xy
Step-by-step explanation:
1. there is addition so we can't multiply the sums and make it 2a³b³.
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