Select the difference of (2x2 - 3x3) - (9x2 - 5x3)

Question

Select the difference of (2x2 - 3x3) - (9x2 - 5x3)

 

I come up with the answer -7x^2+2x^3. Is this correct?

Answer 1

Yeah, good job, that's correct. Teachers often like answers to have the first term to have the largest exponent, or power. Your answer's right, I'd just write it as 2x³ - 7x².