Subtract (2x^3 + 9x-8) - (4x^2-15x+7)

Distribute the "-" to the second expression. Once you got that, combine the two expressions so they would be:

2x^3 + 9x - 8 - 4x^2 + 15x - 7

Then combine like terms. So you would combine 9x + 15x and - 8 - 7.

Put it in correct order, largest exponents first.

2x^3 - 4x^2 + 24x - 15

There ya go!

Answer: (2x^3 + 9x-8) - (4x^2-15x+7)

Step-by-step explanation:

it is that if the X's are variables