3(-2X-5)+2X=9
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3(-2X-5)+2X=9
![3(-2X-5)+2X=9](/uploads/image/z/17600302-46-2.jpg?t=3%EF%BC%88-2X-5%EF%BC%89%2B2X%3D9)
3(-2X-5)+2X=9
-6x - 15 + 2x =9
-4x -15 =9
-4x =24
x= -6
-6x - 15 + 2x =9
-4x -15 =9
-4x =24
x= -6
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
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
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),
解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
解方程:(x-2)(x^2-6x-9)=x(x-5)(x-3)
(x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550