化简 :(3x²-4)-(2x²-5x+6)+(x²-5²)
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
计算[(x²-5x+6)/(x²-4x+3)]+[(x²-4x+3)/(x²-2
4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
化简 :(3x²-4)-(2x²-5x+6)+(x²-5²)
已知:单项式x²,-2x²,3x²,-4x²,5x²,-6x²
3x²-【5x²+(3x²-2x)-(2x²-4x)】 化简
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
5x²+4-3x²-5x-2x²-5+6x,其中,x=-3
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
(1/x²+3x+2)+(1/x²+5x+6)+(1/x²+4x+3)
已知(x-2)(x²-6x-9)=x(x-5)(x-3),求6x的算术平方根