已知ab不等于0,a*a+ab-2b*b=0,求(2a-b)/(2a+b)的值 设m和n满足m*m+n*n+m*m+n*n+10mn+16=0,求m和n的值已知a*a*b*b+a*a+b*b+1=4ab,试求a,b值已知a*a+b*b=5,c*c+d*d=2,求(ac+bd)(ac+bd)+(ad-bc)(ad-bc)的值
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![已知ab不等于0,a*a+ab-2b*b=0,求(2a-b)/(2a+b)的值 设m和n满足m*m+n*n+m*m+n*n+10mn+16=0,求m和n的值已知a*a*b*b+a*a+b*b+1=4ab,试求a,b值已知a*a+b*b=5,c*c+d*d=2,求(ac+bd)(ac+bd)+(ad-bc)(ad-bc)的值](/uploads/image/z/1982340-36-0.jpg?t=%E5%B7%B2%E7%9F%A5ab%E4%B8%8D%E7%AD%89%E4%BA%8E0%2Ca%2Aa%2Bab-2b%2Ab%3D0%2C%E6%B1%82%282a-b%29%2F%282a%2Bb%29%E7%9A%84%E5%80%BC+%E8%AE%BEm%E5%92%8Cn%E6%BB%A1%E8%B6%B3m%2Am%2Bn%2An%2Bm%2Am%2Bn%2An%2B10mn%2B16%3D0%2C%E6%B1%82m%E5%92%8Cn%E7%9A%84%E5%80%BC%E5%B7%B2%E7%9F%A5a%2Aa%2Ab%2Ab%2Ba%2Aa%2Bb%2Ab%2B1%3D4ab%2C%E8%AF%95%E6%B1%82a%2Cb%E5%80%BC%E5%B7%B2%E7%9F%A5a%2Aa%2Bb%2Ab%3D5%2Cc%2Ac%2Bd%2Ad%3D2%2C%E6%B1%82%EF%BC%88ac%2Bbd%29%28ac%2Bbd%29%2B%28ad-bc%29%28ad-bc%29%E7%9A%84%E5%80%BC)
已知ab不等于0,a*a+ab-2b*b=0,求(2a-b)/(2a+b)的值 设m和n满足m*m+n*n+m*m+n*n+10mn+16=0,求m和n的值已知a*a*b*b+a*a+b*b+1=4ab,试求a,b值已知a*a+b*b=5,c*c+d*d=2,求(ac+bd)(ac+bd)+(ad-bc)(ad-bc)的值
已知ab不等于0,a*a+ab-2b*b=0,求(2a-b)/(2a+b)的值
设m和n满足m*m+n*n+m*m+n*n+10mn+16=0,求m和n的值
已知a*a*b*b+a*a+b*b+1=4ab,试求a,b值
已知a*a+b*b=5,c*c+d*d=2,求(ac+bd)(ac+bd)+(ad-bc)(ad-bc)的值
已知ab不等于0,a*a+ab-2b*b=0,求(2a-b)/(2a+b)的值 设m和n满足m*m+n*n+m*m+n*n+10mn+16=0,求m和n的值已知a*a*b*b+a*a+b*b+1=4ab,试求a,b值已知a*a+b*b=5,c*c+d*d=2,求(ac+bd)(ac+bd)+(ad-bc)(ad-bc)的值
1、a²+ab-2b²=0
(a+2b)(a-b)=0
a+2b=0
a-b=0
∴a=-2b(舍去)
a=b
∴(2a-b)/(2a+b)
=(2a-a)/(2a+a)
=1/3
2、看不清
3、a²-2ab+b²+a²b²-2ab+1=0
(a-b)²+(ab-1)²=0
∴ab-1=0
a-b=0
∴a=1
b=1
4、(ac+bd)(ac+bd)+(ad-bc)(ad-bc)
=a²c²+b²d²+2abcd+a²d²+b²c²-2abcd
=a²c²+b²d²+a²d²+b²c²
=a²c²+b²c²+b²d²+a²d²
=c²(a²+b²)+d²(b²+a²)
=(a²+b²)(c²+d²)
=5×2
=10