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

1 Answer
Apr 15, 2017

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)