1.已知(x‐5)(x‐3)=x^2+6x+c.求b和c的值.2.若2x＋3y‐5＝0,求2^(2x)*8^y的值.

已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10) 已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10| 1.(x*2-3x+3)/(x*2-3x+2)-(x*2-5x+7)/(x*2-5x+6)-1/(x*2-4x+3)2.1/x(x+1)+2/(x+1)(x+3)+3/(x+3)(x+6) 3.已知：x*2-3x+1=0,求x*2+1/x*2. 已知(x-2)(x²-6x-9)=x(x-5)(x-3),求6x的算术平方根 已知x+x^2+x^3+x^4+x^5+x^6=4.4,求x 请解题, 已知3x*x-x=1,求6x*x*x+7x*x-5x+2000 已知x=1/x,求x^2-6x+9/x-3/x+3/x^2+6x+9 已知（3x+1)(x-1)-(x+3)(5x-6)=x^2-10x+m,则m= 已知（3x+1)(x-1)-(x+3)(5x-6)=x^2-10x+m,则m= 已知x²-3x=6,求(x+2)(x+3)-2x(x+1)-5的值 1.已知(x‐5)(x‐3)=x^2+6x+c.求b和c的值.2.若2x＋3y‐5＝0,求2^(2x)*8^y的值. 已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值 1 已知X²+X-1=0,求X³+2X²+2007的值.2 已知1+X+X²+X³+X^4=0,求X+X²+X³+……+X^2010.3 已知X²-5X=6,求（X-1)(X-2)(X-3)(X-4)的值.急用! *-----------------------------------------------*| 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 || 已知x/x^‐1=3,求x^∕x^4‐x^＋1 1.已知x²+2x=2,求x³+4x²+2x-6的值 2.已知x²+x-3=0,求x^4+2x³-x²-2x-2的值 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 已知集合A={X|3X（x-5)小于等于(2x-9)(x-5),B={x|2x^2-x-6>0}求AnB