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Multiply (2x+3y)a n d\ (4x-5y)...

Multiply `(2x+3y)a n d\ (4x-5y)`

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`(2x+3y)xx(4x-5y)`
`2x(4x-5y)+3y(4x-5y)`
`8x^2-10xy+12xy-15y^2`
`8x^2-15y^2+2xy`
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