Answer :
Final answer:
The expression 50x³ - 25x³ + 5x³ is equivalent to 30x³ when x ≤ 0.
Explanation:
The expression is 50x³ - 25x³ + 5x³. When x ≤ 0, the sign of the terms will depend on the sign of x. Positive values of x will result in positive terms, and negative values of x will result in negative terms. Thus, the expression can be simplified to 30x^3, where the coefficient 30 is the sum of the coefficients of the x³ terms.
Therefore, the choice that is equivalent to the expression when x ≤ 0 is a) 50x³ - 25x³ + 5x³.
