1.3X(-9)+7X(-9) 2.【5/6÷(-1/2-1/3)+17/8】÷(-9/8)

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1.3X(-9)+7X(-9) 2.【5/6÷(-1/2-1/3)+17/8】÷(-9/8)
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1.3X(-9)+7X(-9) 2.【5/6÷(-1/2-1/3)+17/8】÷(-9/8)
1.3X(-9)+7X(-9) 2.【5/6÷(-1/2-1/3)+17/8】÷(-9/8)

1.3X(-9)+7X(-9) 2.【5/6÷(-1/2-1/3)+17/8】÷(-9/8)
1.3X(-9)+7X(-9)
=-27-63
=-90
2.【5/6÷(-1/2-1/3)+17/8】÷(-9/8)
=[5/6÷(-5/6)+17/8]*(-8/9)
=[-1+17/8]*(-8/9)
=9/8*(-8/9)
=-1

1. 3X(-9)+7X(-9)=(-9)X(3+7)=-90
2.【5/6÷(-1/2-1/3)+17/8】÷(-9/8)=29/9

解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 1.x+9/x+8- x+10/x+9=x+6/x+5- x+7/x+6;2.x³+2/x²-x+1+ x³-9/x²+2x+4=2x-1;3.x-a-b/c+ x-b-c/a+ x-c-a/b=3.(空开的指另一个分式)第二题不用了。 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3(x/x-2 - 1-x²不是一起的!)2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8(5x/x²+x-6 - 5-2x不是一起的!)3、x-4/x-5 + x-8/x-9=x-7/x- 解下列方程1.(x-7)(x+9)+2x(x-5)=(3x-4)(x-1) 2.(x-3)(x+3)-(3x+1)²=8x(5-x)解下列方程1.(x-7)(x+9)+2x(x-5)=(3x-4)(x-1) 2.(x-3)(x+3)-(3x+1)²=8x(5-x) 1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/(x^2-5x+6)+(x^2-3x+8)/(x^2-4x+3)2.{(x^2)/(x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{(x^2/x^2+y^2)^2} EXCEL两表间同时满足两个条件数据引用如题:表1为原始数据表1 2 3 4 5 6 7 8 9 10.A X X X X X X X X X XB X X X X X X X X X XC X X X X X X X X X XD X X X X X X X X X X .表2(A列) (B列) (C列)A 1A 3B 8B 5C 2D 3...... 3≤|8-x| |x+1|>2-x |x+3|7|x+1| x^2-6|x|+9>0 |x-1|+|x+2|≥5 (1)方法 (x-7)(x-9) 解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3) 解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3) (1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8(2) 已知x+3/(x-2)^2=A/x-2 + B/(x-2)^2 ,求A和B的值. (x-6)/(x-5)-(x-7)/(x-6)=(x-9)/(x-8)-(x-10)/(x-9) 化简(x+2)(x的平方-6x-9)-(x-5)(x-3)x 9道因式分解题1.(x+y)^3+2xy(1-x-y)-1 2.x^3+x^2-2004*2005x 3.(x^2-x-6)(x^2+3x-4)+24 4.x^6+15x^3y+50y^2 5.(x^2+4x+6)+(x^2+6x+6)+x^26.(x-3)(x+4)(x-5)(x+6)+807.x^3-7x+68.x^4+y^4+(x+y)^49.xy(xy+1)+(xy+3)-2(x+y+1/2)-(x+y-1)^2 解分式方程:(x-4/x-5)-(x-5/x-6)=(x-7/x-8)-(x-8/x-9) 4道不等式.快.1.(x-1)(x-2)+(x-2)(x-3)-2(x-3)(x-4)≤-42.(x-6)(x-9)-(x-7)(x-1)>7(2x-5)3.(x-6)(x-9)-(x-7)(x+1)≤7(2x-5)4.x(x-3) 解方程 (x-5分之x-4)-(x-6分之x-5)=(x-8分之x-7)-(x-9分之x-8)速度