1.8(0.5x-2)=0.5x
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
2(0.9-x)+4=4.3.(x+1.8)/8=6.6.12x+12=16x.12x-35=5x.X/0.5-10+2
6X-(360X-0.5X)=2×(360X-0.5X)
(X-4)(x-2)-2(X-1)(X+3)其中X=-0.5
5x-4x=2*1.8,5x-2+3x=3.6,x+4x=20.3,8x+10-3x=30,10.5-0.5x+0.5=
3.14*(0.5x)(0.5x)*2x=50
x-2/0.2-x+1/0.5=3 x=?
4-x=2(-0.5x²+2.5x-2)
x+24/2*0.5=x x 等于所少
f(x)=x/(1+x^2)^0.5
7.5x-0.5x-2x=130 解方程
4X+0.5X=13.5X