Find : (3x+2y) (3x+2y)
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Answer:
(3x+2y)²
(3x)²+2(3x)(2y)+(2y)²
9x²+12xy+4y²
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( 3x+2y)(3x-2y)
=3x(3x-2y)+2y(3x-2y)
=9x²-6xy+6xy-4y²
= 9x²-4y²
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