1.3(2X-1)(X+6)-5(X-3)(X+6) 2.(a-b)(a^2+ab+b^2)

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1.3(2X-1)(X+6)-5(X-3)(X+6)2.(a-b)(a^2+ab+b^2)1.3(2X-1)(X+6)-5(X-3)(X+6)2.(a-b)(a^2+ab+b^2)1.3(2X-1)(

1.3(2X-1)(X+6)-5(X-3)(X+6) 2.(a-b)(a^2+ab+b^2)
1.3(2X-1)(X+6)-5(X-3)(X+6) 2.(a-b)(a^2+ab+b^2)

1.3(2X-1)(X+6)-5(X-3)(X+6) 2.(a-b)(a^2+ab+b^2)
3(2X-1)(X+6)-5(X-3)(X+6)
=6x^2+33x-18-5x^2-15x+18
=x^2+18x
(a-b)(a^2+ab+b^2)
=a^3+a^2b+ab^2-a^2b-ab^2-b^3
=a^3-b^3

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 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 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 计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1 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- 1.(1/X-1 )-2=X^-3X/X^-12.(X/X+1)^+5(X/X+1)+6=03.(8(X^+2X)/X^-1)+ 3(X^-1)/X^+2x x/(x-2)-(1-x ² )/(x ² -5x+6)=(2-x)/(x-3) 解方程,急 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...... 求:(x-2)(x²-6x-9)-x(x-3)(x-5)其中x=三分之一.以及x²(x-1)-x(x²+x-1)其中x=二分之一的答案 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 (8-7x-6x²+2x³)+(x³+5x²+4x-1)-(-x²-3x+2x³-3) (2x+1)(3x-2)-6x(x-1)-5x+9 5x-3(2x+1)=6x-4(5-3x)求x 5x-3(2x+1)=6x-4(5-3x)求x 2(5x-4)-3(x+6)=5(x-1)-x 求x. 麻烦解4道分式方程(20分)(x/2x-5)+(5/5-2x)=1(x+1/x*x-2x)-(1/x)=3/x-2(1-x/5-x)-(5-x/1-x)=8/x*x-6x+5(x+1/x-1)-(4/x*x-1)=1去掉括号,不管前面正负,都不变号~ 试说明:不论x取何值,代数式(x^+5x^+4x-1)-(-x^-3x+2x^-3)+(8-7x-6x^+x^)的值不...试说明:不论x取何值,代数式(x^+5x^+4x-1)-(-x^-3x+2x^-3)+(8-7x-6x^+x^)的值不变问题补充:速度!