Question

How do you simplify `(3x + 7)^3`?

Answer 1

Rewrite the expression as `(3x+7)(3x+7)(3x+7)` and expand.

Explanation:

`(3x+7)(3x+7)(3x+7)`
multiply each bracket using the FOIL method.
`(9x^2 + 21x + 21x + 49)(3x+7)`
`(9x^2 + 42x+ 49)*(3x+7) = (343 + 441 x + 189 x^2 + 27 x^3)`