4(3x+4)²=9(3-2x)²
9x+6x²-3(x-2/3x²),其中x=-2 1/4(-4x²+2x-8)-(1/2x
先化简再求值:(x+2/x²-2x - x-1/x²-4x+4)÷ x-4/x,其中x=3/2
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
3X+(X+2)+(X+1)*(X-1)=4*(X²+8)
3x²+【5x-2(4x-5)-9x²】=?
如何解4x²-x=0、x²-6x+9=(2x+3)²、(3x-2)=(x+4)²
7x²-4x-3=0 -x²-x+12=0 x²-6x+9=0 (3x-2)²=
计算(1).(5x-2)(x-3)-(3x-1)(x-4)= (2).(x+3)(x²+9)(x-3)=
计算 (5x-2)(x-3)-(3x-1)(x-4)= (x+3)(x²+9)(x-3)=
4x/(x²+x+3) + 5x/(x²-5x+3)= - 3/2
3x(x²+2x²+1)-x(x-2)(2x+4)=?