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Find the products: (x+3y)(x^2-\ 3x y+9y^...

Find the products: `(x+3y)(x^2-\ 3x y+9y^2)`

Text Solution

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Solution
`=>(x +3y)(x^2 -3xy + 9^2)`
Using Identity
`(a+b)(a^2 -ab +b^2)= a^3 +b^3`
`=>(x +3y)((x^2)-(3y)(x)+(3y^2))`
`=>x^3 +3y^3`
`=>x^3 + 27y`
Hence the required answer is obtained.
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