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Write down the product of \ 8x^2y^6a n d...

Write down the product of `\ 8x^2y^6a n d-20 x ydot` Verify the product for `x=2. 5 , y=1.`

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`\ 8x^2y^6a n d-20 x y`
`(-20xx8)xxx^3xxy^7`
`=(-160)x^3y^7`
When,x=2.5 and y=1, then
`=(-160)(2.5)^3(1^7)`
`=(-160)(15.625)(1)`
`= -2500`
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RD SHARMA-ALGEBRAIC EXPRESSIONS AND IDENTITIES-All Questions
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