2(x+5)^2-(x+6)^2-(x+2)(x-2)=42 (2x+1)(x-3)-(2x+3)(x-1)大于等于12
2(x+5)^2-(x+6)^2-(x+2)(x-2)=42 (2x+1)(x-3)-(2x+3)(x-1)大于等于12
3x-7/5大于等于x-2/2,x/4-2x-1/12大于1/6-x/3
(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几?
3x小于4x,5x-4大于等于2+7x 4x-5大于2x+1,5x-9大于x-1 9x+4小于等于6x+1,2x-8小于
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
解不等式:(3x-2)(2x-3)大于等于(6x+5)(x-1)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
解不等式 3x^2-5x+4大于0 6x^2+x-2小于等于0 x(x-3)(x+1)(x-2)小于0
解不等式组①(x-1)(x+2)大于等于(x+3)(x-3) 2(2x-1)(3x-5)大于6x平方-21
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4