(x+3)×(3x-2)+7(3-X)
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
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
(3x^2+9x+7)/(x+1)-(2x^2-4x+3)/(x-1)-(x^3+x+1)/(x^2-1)是不是错了?
解不等式x(x-3)>(x+7)(x-7)
5x/(x+3)(x+2)+(2x-5)/(x-4)(x+3)=(7x-70)/(x+2)(x+4)
计算 x(x+3)-(x-1)(x-2)
(x-1)^3(x+1)(x-2)/(x+4)
f(x)=x²+3x|x-2|
(x+1)(x+2)(x+3)(x+4)+1
x+ (x +1)+(x+2) +(x +3)=38
(3x-2)(x+5)-7x(x的2次方-3x+1)