you would first distribute the -2 with x - 2, which should give you -2x + 4, and you want to do the -3 - 21, which would give you -24, then subtract 4 from -2x + 4, then you should have -2x = -28, then divide it by -2, which should give you x = 14
The answer you are looking for is -5x^5-5x^4+6x^3-x^2-7x+20 -I hope this is the answer you are looking for, please feel free to post your future questions on Brainly.com.