当x=2,(x-x²-5)-(2x²+7x-3)等于几
当x=2,(x-x²-5)-(2x²+7x-3)等于几
(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几?
当x=5时,(x²-x)-(x²-2x+1)等于
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
15-(7-5x)=2x+(11-3x)求x等于几
函数f(x)= x-5(当x大于等于6) f(x+2)(当X
x/(x-3)-2/(x+3)=1【x等于几
(2x-6)/(x²-4x)/(X+3)*( x²+x-6)/(3-x)等于多少?
当x=-(1/2)时,代数式(x)/)x+1)-【(x+3)/(x+1)】*【(2x²+6x)/(x²
当x等于()时,函数3x²-12 /x-2的值为零
2x+(x-3)5=36 x等于几啊
(-3x²)(-x²+2x-1) 等于?