Answer:
125x^3
Step-by-step explanation:
(5x)^3 is the same as (5x) × (5x) × (5x).
(5x) × (5x) = 25x^2
(25x)^2 × 5x = 125x^3
Remember that when you're multiplying variables, the product will gain an exponent.
(For example: x multiplied by x, equals x^2.)
Hope this helps :)