To simplify, we can use the FOIL method. That stands for first, outer, inner, last. What we do is take two factors at a time and multiply the first terms by each other, the outer terms together, etc.
Let's start with (2x-1) and (x+5)
First: 2x * x = 2x^2
Outer: 2x * 5 = 10x
Inner: -1 * x = -x
Last: -1 * 5 = -5
2x^2 + 9x - 5
Now FOIL this result with (3x - 2)
6x^3 - 4x^2 + 27x^2 - 18x - 15x + 10
Simplify:
6x^3 - 23x^2 - 33x + 10