(x+2)^2=25 x^2-3x-1=0 9(2x+3)^2-4(2x-5)^2=0

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(x+2)^2=25 x^2-3x-1=0 9(2x+3)^2-4(2x-5)^2=0
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(x+2)^2=25 x^2-3x-1=0 9(2x+3)^2-4(2x-5)^2=0
(x+2)^2=25 x^2-3x-1=0 9(2x+3)^2-4(2x-5)^2=0

(x+2)^2=25 x^2-3x-1=0 9(2x+3)^2-4(2x-5)^2=0
(x+2)^2=25
x+2=5 x+2=-5
x=3或x=-7
x^2-3x-1=0
x=(3±√13)/2
x=(3+√13)/2 x=(3-√13)/2
9(2x+3)^2-4(2x-5)^2=0
9(2x+3)²=4(2x-5)²
3(2x+3)=2(2x-5) 3(2x+3)=-2(2x-5)
2x=-19 -10x=1
x=-19/2 x=-1/10

(x+2)^2=25
x+2=±5
x1=3 x2=-7
x^2-3x-1=0
x1=(3+√13)/2 x2=(3-√13)/2
9(2x+3)^2-4(2x-5)^2=0
(6x+6)²=(4x-10)²
6x+6=4x-10 或 6x+6=-(4x-10)
x1=-8 x2=0.4

(x+2)^2=25
x+2=5或x+2=-5
x=3或x=-7
x^2-3x-1=0
x^2-3x+9/4=1+9/4
(x-3/2)^2=13/4
x=(3+根号13)/2或x=(3-根号13)/2

(X+1)X(X+2)X(X+3)=504 一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X x-2x+3x-4x+5x.+99x-100x=25求解 (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) x(x-2)-2x(x+1)-3x(x-5) 其中x=负½ x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x 请问这道题咋做 ：（x）X (x+1) X (x+2) X (x+3) =360 x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? X+X+X+(X-1)+(X-2)+(X-3)+(X-4)=10(X-3)+(X-4) x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002 x^2+2x-8/x^3+25x+x/(x-2/x-x+4/x+1,其中x=-4/5 若x^3+x^2+x+1=0,则x^-27+x^-26+x^-25+……+x^-1+1+x+……+x^26+x^27 写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(x-2)-4 (x+1)/(x+2)+(x+8)/(x+9)解答x+1/x+2+x+8/x+9=x+2/x+3+x+7/x+8 *-----------------------------------------------*| 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 || x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,