Question

3x^2-8x+2x^2-13x^2+2x-2x^3+3,其中x=-3/2

Answer 1

3x^2-8x+2x^2-13x^2+2x-2x^3+3

=3x^2+2x^2-13x^2-2x^3-8x+2x+3

=-8x^2-2x^3-6x+3

=-8*(-3/2)^2-2*(-3/2)^3-6*(-3/2)+3

=-8*9/4+2*27/8+9+3

=-18+27/4+12

=-6+27/4

=-6+6+3/4

=3/4