多項數...........百分數

11
(3+2x^3-2x)+(3x-1-4x^2)
=2x^3-4x^2+x+2
=2+x-4x^2+2x^3

12
(3x^2-6)(x-1)
=3x^3-3x^2-6x+6
=6-6x-3x^2+3x^3

13
(2x-3x^2-3)-(3x+2-2x^3)
=2x^3-3x^2-x-5

14
(4x+9)(5-3x^2)
=20x-12x^3+45-27x^2
=-12x^3-27x^2+20x+45

1
50*20%
=10

2
$5000*72%
=$3600

11) 2 +x -4x^2 +2x^3
12) 1 - 6x -3x^2 + 3x^3
13) -5 - x -3x^2 + 2x^3
14) 45 + 20x - 18x^2 - 8x^3
15) 50 x 20% = 10
16) $5000 x 72% =$3600