3x²+【5x-2(4x-5)-9x²】=?
4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
3x²+【5x-2(4x-5)-9x²】=?
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
4x/(x²+x+3) + 5x/(x²-5x+3)= - 3/2
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)=
已知(x-2)(x²-6x-9)=x(x-5)(x-3),求6x的算术平方根
求代数式的值 6x+2x²-3x+x²+1 其中x=-5 4x+3xy-x²-9 其中x=
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1