Question

How do you factor `x^3 + 729`?

Answer 1

Factor `x^3 + 729`

Ans: `(x + 9)(x^2 - 9x + 81)`

Explanation:

Apply the formula: `a^3 + b^3 = (a + b)(a^2 - ab + b^2)`
`x^3 + 9 = (x + 9)(x^2 - 9x + 81)`