5(x-5)+2(x-12)=0
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8
(2x-2)(x-1)=0 x(x-5)=5x-10
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
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
解方程①(x+3/x-1)²-5(x+3/x-1)+6=0 ②x²-2/x+3-6x+18/x
求和:Sn=1+3x+5x*x+7x*x*x+……+(2n-1)x^n-1 (x不为0和1)
初一数学x*x+2x+5的值为7,请求3x*x+6x+3的值.因为x*x+2x2x+3=3x(x*x+2x)+2x+2x
(x-1)/x -(1-x)/(x+1)=(5x-5)/(2x+2) x等于多少
(12分)已知A={x|x²-5x-6≤0},B={x|x+2/3-x≥0}
(先化简后求值)(3x/x+2-x/x-2)+2x/x^2-4,x=4-根号5,