化简计算~1/(x2-5x+6) - 1/(4x-x2-3) - 1/(3x-x2-2)

来源：学生作业帮编辑：搜狗做题网作业帮分类：数学作业时间：2024/04/27 21:46:48

化简计算~
1/(x2-5x+6) - 1/(4x-x2-3) - 1/(3x-x2-2)

1/(x2-5x+6) - 1/(4x-x2-3) - 1/(3x-x2-2)
=1/(x2-5x+6) + 1/(x2-4x+3) + 1/(x2-3x+2)
=1/(x-2)(x-3)+1/(x-3)(x-1)+1/(x-2)(x-1)
=1/(x-3)-1/(x-2)+1/2(x-3)-1/2(x-1)+1/(x-2)-1/(x-1)
=3/2(x-3)-3/2(x-1)=3/(x-3)(x-1)

化简计算~1/(x2-5x+6) - 1/(4x-x2-3) - 1/(3x-x2-2) (x2+3x+9)/(x2-27)+(6x)/(9x-x2)-(x-1)/(6+2x) 解方程：1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x 1/(x2+3x+2)+1/(x2+5x+6)+1/(x2+7x+12)=1/(x+4) 计算：（1）x2+9xx2+3x+x2−9x2+6x+9 1/(x2+x)+1/(x2+3x+2)+1/(x2+5x+6)+1/(x2+7x+12)=4/21 解方程：X2--1/8(X2+2X)+X2+2X/3(X2--1)=11 (x/x2-9)-(1/x2+6x+9)计算计算：5x(x2-3x-1)-x2(1-x) 及急（-2x2+3x）-[5x-（2x2+1）-x2]．解方程2/x2+x+3/x2-x=4/x2-1 x2+3x+9/x2-27+6x/9x-x2-x-1/6+2x 化简