Expand using formula
(3x + 5y + 2)(3x + 5y – 2)
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Answer:
(3x−5y)
2
=(3x−5y)(3x−5y)
=(3x)
2
−2.3x.5y+(5y)
2
=9x
2
−30xy+25y
2
∴(3x−5y)
2
=9x
2
−30xy+25y
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