20x^2-43xy+m=(4x-7y)(5x+n),则m= .n= .
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 17:47:47
20x^2-43xy+m=(4x-7y)(5x+n),则m=.n=.20x^2-43xy+m=(4x-7y)(5x+n),则m=.n=.20x^2-43xy+m=(4x-7y)(5x+n),则m=.n
20x^2-43xy+m=(4x-7y)(5x+n),则m= .n= .
20x^2-43xy+m=(4x-7y)(5x+n),则m= .n= .
20x^2-43xy+m=(4x-7y)(5x+n),则m= .n= .
20x^2-43xy+m=(4x-7y)(5x+n)=20x²+4xn-35xy-7ny
m=-7ny
-43xy=-35xy+4xn
-8xy=4xn
n=-2y
20x^2-43xy+m=(4x-7y)(5x+n),则m= .n= .
已知(4x-7y)(5x-2y)=M-43xy+14y^2,则M等于
若x+y的平方等于x-y的平方+m,则m=( )A 2xy B -2xy C 4xy D-4xy
求(3x^+y^-5xy)-【2x^-(-4xy-y^+7x^)】=?
求(3x^+y^-5xy)-【2x^-(-4xy-y^+7x^)】=?
已知关于xy的方程组2x-y=4m+3,2y-x=-7的解xy互为相反数求m的值
已知1/x-1/y=2,求3x+7xy-3y/2x-3xy-2y答案是1/x-1/y=2(y-x)/xy=2 得:x-y=-2xy(3x+7xy-3y)/(2x-3xy-2y)=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy)=xy/(-7xy)=-1/7 谁能帮我解释一下=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy) 是怎
下列计算结果正确的是( )A.3x^2-5xy^2=-2xy^2 B.-2^2x^3y^3-2xy=2x^3y^3C.28x^4y^2+7x^3y=4xy D.1/49-m^2/1/m^2-7m=-m/m+7
化简求值x-4y/2x-7xy+3y×x-2xy-3y/2x+3xy-2y÷3x-6y/4x-4xy+y,其中:x=1999,y=-1
已知xy满足方程组2x+y=5+m 4x+7y=1+3m则x-2y的值为
多项式x^2-4xy+m可以因式分解为(x+3y)(x-7y),则m的值为
(-3x^y+2xy)-( )=4x^+xy
m=x^-3xy^+2xy^+3y三次方,n=x三次方-2x^+xy^-5y三次方,则2x-7x^y三次方+5xy^+14y三次方等于多少?
2*X平方-4Y平方=7XY,XY不等于零,求Y/X
通分:x-y/2x+2y与xy/(x+y)^2 ,2mn/4m^2-9与2m-3/2m+3格式:例如:x-y/2x+2y与xy/(x+y)^2最简公分母是.x-y/2x+2y=.xy/(x+y)^2=.
x的平方-4xy+4y的平方-3x+6y=(x-2y)(x-2y+m),那么m=
已知x+y=4,xy=2,求代数式2(3x+2xy)+(2xy+3x+2y)-(4xy-7y)的值
x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值