Find the product of (9x+5y)(4x+3y) | competitive exams special | Basic Mathematics |Based on algebra

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Find the product of (9x+5y)(4x+3y)
(9x+5y)(4x+3y)
=9x(4x+3y)+5y(4x+3y)
=36x²+27xy+20xy+15y²
=36x²+47xy+15y²

Find the product of (9x-5y)(4x+3y)
(9x-5y)(4x+3y)
=9x(4x+3y)-5y(4x+3y)
=36x²+27xy-20xy-15y²
=36x²+7xy-15y²

Find the product of (9x+5y)(4x-3y)
(9x+5y)(4x-3y)
=9x(4x-3y)+5y(4x-3y)
=36x²-27xy+20xy-15y²
=36x²-7xy-15y²

Find the product of (9x-5y)(4x-3y)
(9x-5y)(4x-3y)
=9x(4x-3y)-5y(4x-3y)
=36x²-27xy-20xy+15y²
=36x²-47xy+15y²

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