Answer:
48x^3 -4x^2 + 18x -40
Step-by-step explanation:
multiply 8x^2 by 6x and -5 ➡ 48x^3 - 40x^2
multiply 6x by 6x and -5 ➡ 36x^2 -30x
multiply 8 by 6x and -5 ➡ 48x -40
now add the like terms
48x^3 - 40x^2 + 36x^2 -30x + 48x -40 ➡48x^3 -4x^2 + 18x -40
