4(x+1.25x)=360
4(x+1.25x)=360
4x+x×1.25x=360(解方程)
4*1.25x+4x=360
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
3/x-1=4/x 6/x+1=x+5/x(x+1)
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
x^4表示( ) A.4x B.x+x+x+x c.x*x*x*x D.x+4
(先化简后求值)(3x/x+2-x/x-2)+2x/x^2-4,x=4-根号5,
解方程:(x^2-2)(-x^2+2)=(2x-x^2)(2x+x^2)+4x
6X-(360X-0.5X)=2×(360X-0.5X)
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x