(x-5y)(-x-5y)-(-x+5y)的平方,其中x=-1,y=0.5 有图
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/16 18:28:41
xQN@
(x-5y)(-x-5y)-(-x+5y)的平方,其中x=-1,y=0.5 有图
(x-5y)(-x-5y)-(-x+5y)的平方,其中x=-1,y=0.5 有图
(x-5y)(-x-5y)-(-x+5y)的平方,其中x=-1,y=0.5 有图
原式=(-5y+x)(-5y-x)-(x²-10xy+25y²
=25y²-x²-x²+10xy-25y²
=-2x²+10xy
=-2-5
=-7
(x-5y)(-x-5y)-(-x+5y)^2=(-x+5y)((x+5y)-(-x+5y))=2x(-x+5y)=2*(-1)*(1+5*0.5)=-7.5
(x+y-5)*(x+y-5)+(x-y+3)=0 x*x-y*y
已知:3x-5y=0,求x/y,x-y/y,x-y/x
计算:5x/x-y+ 5y/y-x
5x/x-y+5y/y-x
(5)a(x+y)-b(x+y)-x-y因式分解
5x(x-y)+2y(x-y)
化简:5(x-y)+2(x+y)-3(x-y)
x+y=5; x^y+y^x=17
(y-x)(x-y)^3(y-x)^5怎么算
x-y+5y-4y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y=
4x+2y-5x-y
(x+5y)(x-7y-1)
-X²y+ 5X²y
(2x-3y)-(5x-y)
(2X-3y)-(5x-y)
y/5x² * (-x/y)