Question

Find the product: (x-3y)(x+3y)(x²+9y²).. polynomials

Answer 1

`x {}^(4) - 81 {y}^(4)`

Explanation:

`(x - 3y)(x + 3y)(x {}^(2) + 9 {y}^(2))`

`( {x}^(2) - 9y {}^(2) )( {x}^(2) + 9 {y}^(2) )`

`x {}^(4) - 81 {y}^(4)`