若x^2+2xy+y^2-a(x+y)+25是一个完全平方式,则a=_已知x^2-3xy+2y^2=0(xy不等于0),则x/y+y/x=?若(2x-1)^5=fx^5+ex^4+dx^3+cx^2+bx+a,则a=?,f+e+d+c+b=?先回答先得分
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![若x^2+2xy+y^2-a(x+y)+25是一个完全平方式,则a=_已知x^2-3xy+2y^2=0(xy不等于0),则x/y+y/x=?若(2x-1)^5=fx^5+ex^4+dx^3+cx^2+bx+a,则a=?,f+e+d+c+b=?先回答先得分](/uploads/image/z/3817789-61-9.jpg?t=%E8%8B%A5x%5E2%2B2xy%2By%5E2-a%EF%BC%88x%2By%EF%BC%89%2B25%E6%98%AF%E4%B8%80%E4%B8%AA%E5%AE%8C%E5%85%A8%E5%B9%B3%E6%96%B9%E5%BC%8F%2C%E5%88%99a%3D_%E5%B7%B2%E7%9F%A5x%5E2-3xy%2B2y%5E2%3D0%EF%BC%88xy%E4%B8%8D%E7%AD%89%E4%BA%8E0%EF%BC%89%2C%E5%88%99x%2Fy%2By%2Fx%3D%3F%E8%8B%A5%EF%BC%882x-1%EF%BC%89%5E5%3Dfx%5E5%2Bex%5E4%2Bdx%5E3%2Bcx%5E2%2Bbx%2Ba%2C%E5%88%99a%3D%3F%2Cf%2Be%2Bd%2Bc%2Bb%3D%3F%E5%85%88%E5%9B%9E%E7%AD%94%E5%85%88%E5%BE%97%E5%88%86)
若x^2+2xy+y^2-a(x+y)+25是一个完全平方式,则a=_已知x^2-3xy+2y^2=0(xy不等于0),则x/y+y/x=?若(2x-1)^5=fx^5+ex^4+dx^3+cx^2+bx+a,则a=?,f+e+d+c+b=?先回答先得分
若x^2+2xy+y^2-a(x+y)+25是一个完全平方式,则a=_
已知x^2-3xy+2y^2=0(xy不等于0),则x/y+y/x=?若(2x-1)^5=fx^5+ex^4+dx^3+cx^2+bx+a,则a=?,f+e+d+c+b=?先回答先得分
若x^2+2xy+y^2-a(x+y)+25是一个完全平方式,则a=_已知x^2-3xy+2y^2=0(xy不等于0),则x/y+y/x=?若(2x-1)^5=fx^5+ex^4+dx^3+cx^2+bx+a,则a=?,f+e+d+c+b=?先回答先得分
a=10;
2或2.5;
a=1,f=32,e=-80,d=80,c=-40,b=10,结果为2
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