9(x+2)(x-2)-(3x-2)2 =多少?

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9(x+2)(x-2)-(3x-2)2 =多少?
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9(x+2)(x-2)-(3x-2)2 =多少?
9(x+2)(x-2)-(3x-2)2 =多少?

9(x+2)(x-2)-(3x-2)2 =多少?
是9(x+2)(x-2)-(3x-2) 吧 原式=9(x-2)﹣(9x-12x+4) =9x-36-9x+12x-4 =12x-40 =4(3x-10)

x+2/x+3-x+1/x+2=x+8/x+9-x+7/x+8 (-x^4)^2-2(x^2)^3×x×x+(-3x)^3×x^5 x(x*x-6x-9)-x(x*x-8x-15)+2x(3-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 6x-2x+3x-3x-x=1.2×3 化简:(x+3) / x^2-3x - x-1 / x^2-6x+9)除以x-9 / 3X-x^2怎么化? x×x+3x-9/ x+2 多项式x^4+2x^3-4x^2-2x+3与x^3+4x^2+x-6的最大公因式是什么x^4+2x^3-4x^2-2x+3=(x^4+3x^3)-x(x^2+4x+3)+(x+3)=x^3(x+3)-x(x+1)(x+3)+(x+3)=(x+3)[x^3-x(x+1)+1]=(x+3)[x^3+1-x(x+1)]=(x+3)[(x+1)( 3x-7x+2 一道数学化简题,怎么化x+3/x^2-3x-x-1/x^2-6x+9 |x-3|+5=2x |x-3|=2x-5 两边平方得:X平方-6X+9=2X平方-20X+25, X-2分之X=X-5分之X-4怎么解?还有X减3分之X等于X减1分之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 || 分解因式:x*x*x*x+2*x*x*x-9*x*x-2x+8 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X x+2/x+1=5/x-1/x(x+1) 求化简! 当x取何整数值时,能使下式值为正整数.(x^4+x^2-2)/(x^3-x^2+x-1)×(x-1)/(x^3+2x^2+2x+4)×(-2)/(x^3-x-x^2+1) 分解因式:(x^2+5x+6)(x^2+7x+6)-3x^2