(x+y)(x+2y)(x+3y)(x+4y)=-40y的值为根号11

来源：学生作业帮助网 编辑：作业帮 时间：2024/07/05 22:05:20
(x+y)(x+2y)(x+3y)(x+4y)=-40y的值为根号11
xQMO@;6-BŶ?D5D/ "_Q bBj8` k:z/8lm !fg9s\% L=5[2RZ/9|TU?>MoSY:g y]>NPw# >z vP"|NPT .P*0uvE~ktpLz%XL޷IlVN41d-cĴh K~ .Jp$,D_bFe,F+|*(KDo0uck4x7п-!NgE8m;;kO=};:1

(x+y)(x+2y)(x+3y)(x+4y)=-40y的值为根号11
(x+y)(x+2y)(x+3y)(x+4y)=-40
y的值为根号11

(x+y)(x+2y)(x+3y)(x+4y)=-40y的值为根号11
我把方法告诉你,最后的答案你自己做吧,很容易.
(x+y)(x+2y)(x+3y)(x+4y)=-40
(x+y)（x+4y）(x+2y)(x+3y）=-40
(x^2+5yx+44)(x^2+5yx+66)=-40
(x^2+5yx+44)(x^2+5yx+44+22)=-40
(x^2+5yx+44)^2+22(x^2+5yx+44)+40=0
设x^2+5yx+44=m,则原方程化为m^2+22m+40=0,解之得,m1=-20;m2=-2
于是有（1）x^2+5yx+44=-20（2）x^2+5yx+44=-2
把答案解出来即可,注意增根或不符合题意的未知数的值

x(x-y)2-(y-x)3 [2/3x-2/x+y(x+y/3x-x-y)]/x-y/x 化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x 计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 [(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y) 计算：x+2y/x-y+2x/y-x-3y/x-y 化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方 (3x-y)(3y+x)-(x-y)(x+y) 化简y(x+y)+(x+y)(x-y)-x^2 {(x,y) |x|+|y| x>y?x:y 因式分解x(x+y)(x-y)-x(x+y)^2 (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 2X(2X-3Y)-3Y(X+Y) (-2x y)^2-(3y-x)(-x-3y) （x+2y)^2-(x+y)(3x-y)