x^2-4(0.5-0.25x)(1.5-0.75X)-24(0.5-0.25X)^2
求1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1 其中x=12/13
1/2X^3-1/4X+0.2X^2+0.25x-0.5x^3-1/5x^2的值与x无关
先化简再求值先化简再求值:(x-x/x+1)(x+1/x^2+4x+4)(x^2-4/x^2-2x),其中x=-0.5
30X-2X=84 5.8X-X=60 6.6X-5X=8 4X-X=24 1.5X-X=1
1.说明多项式1/2x³-1/4x+0.2x²+0.25x-0.5x³-1/5x²
x/2- 2-x/5≥-6 0.25(3-2x)>0.5x+10
如果(x-a)(x+0.5)=x^2-0.25,那么x等于几
(X-4)(x-2)-2(X-1)(X+3)其中X=-0.5
20+4x=6x-24 3(3x-2)=10-0.5(x-3.5)
x+(x+24)+(x+4)/2=7x
(x-1)(x-2)(x-3)(x-4)-24 因式分解
(x+1)(x+2)(x+3)(x+4)-24因式分解