Question

(3/2r5-5r4+3r2-6r+9) - (2r5+2r2-2r2+2)

Answer 1

(3/2 r5 - 5 r 4 + 3 r 2 - 6r + 9) - ( 2 r 5+ 2 r2-2r2+2)=
(15/2 r- 20r + 6r -6r + 9) - (10r+ 2)=
(-25/2r + 9) - 10r - 2=
-45/2r + 7