hello! please help me guys solve this problem with correct step : verify that (3x+5y)²-30xy=9x²+25y²
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(3x+5y)²-30xy
=9x²+2*3x*5y+25y²-30xy
=9x²+30xy+25y²-30xy
=9x²+25y²(proved)
=9x²+2*3x*5y+25y²-30xy
=9x²+30xy+25y²-30xy
=9x²+25y²(proved)
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