作业帮 > 数学 > 作业

数学题x-15/x^2-9-2x/9-x^2÷x/3+x

来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/11/08 13:59:58
数学题x-15/x^2-9-2x/9-x^2÷x/3+x
原式=[ (x-15)/(x²-9) ]- [ 2x/(9-x²) ]÷[ x/(3+x) ]
=[ (x-15)/(x²-9) ]+[ 2x/(x²-9) ]×[ (x+3)/x ]
=[ (x-15)/(x²-9)] +[ 2(x+3)/(x²-9) ]
=[ (x-15)+2(x+3) ]/(x²-9)
=(x-15+2x+6)/(x²-9)
=(3x-9)/(x²-9)
=3(x-3)/[(x-3)(x+3)]
=3/(x+3)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? (2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3) (x^21+x^15+x^12+x^9+x^6+x^3+1)/(x^2+x+1) (x+2/x^2-x-6)-(2x/x^2-3x)-(x+1/x^2-6x+9) 计算:(x+2)/(x^2 - x - 6) + 2x/(x^2 - 3x) - x/(x^2 - 6x + 9) x+2/x^2-x-6 + 2x/x^3-3x - x+1/x^2-6x+9 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 数学题(X²-3X+2)(X²-X+2)-15X² x^2-x/x+1÷x/x+1 ；x^2+6x+9/x^2-9÷x+2/x-3；2/a÷4/a 计算：(x^3-3x^2)/(x^2+5x+6)÷(x^3-9x)/(x^2+2x-3)*(x+2)/(2x) 已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值