0.5X*(14-X)=24
换元法解方程(x²-5x)/(x+1)+(24x+24)/(x²-5)+14=0
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
用换元法解方程(1)x+1分之x平方-5x+x(x-5)分之24(x+1)+14=0(2)x+1分之2(x平方+1)+x
6X-(360X-0.5X)=2×(360X-0.5X)
(x-22)+(x-24)+(x-27)+(x-20)=x
解方程(x²-5x)/(x+1)+(24x+24)/(x²-5x)+14=0
x+24/2*0.5=x x 等于所少
x(x-14)二0*x平方十|2x十27=0,x平方=x+56,x(5x+4)=5x+4,4x平方-45=3|x,-3x
x^2+14x-24=0
若1+x+x*x+x*x*x=0,求x+x*x+x*x*x+.+x(2000次幂)
x(80-0.5x)=750
5*(x-2)=4*(x+3) 2x+(50-x)*4=140 3x-(8-x)=20*4 200x=(x-0.5)*2