2x^2+6x+21
_____________
x-3) 2x^3 +3x-4
2x^3-6x^2
_________
6x^2+3x
6x^2-18x
__________
21x-4
21x-84
________
88
2x^3+3x-4)÷(x-3)=2x^2+6x+21…88