will give brainliest
please give an explanation

Answer:
5x³ -13x² -13x +21
Step-by-step explanation:
The distributive property is used to eliminate parentheses. Then like terms are combined.
(x -3)(5x² +2x -7) = x(5x² +2x -7) -3(5x² +2x -7)
= 5x³ +2x² -7x -15x² -6x +21
= 5x³ -13x² -13x +21