已知x,y满足√(x+3y-1)+| 2x-y-9 |=0求5/4x+4的平方根.

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已知x,y满足√(x+3y-1)+|2x-y-9|=0求5/4x+4的平方根.已知x,y满足√(x+3y-1)+|2x-y-9|=0求5/4x+4的平方根.已知x,y满足√(x+3y-1)+|2x-y

已知x,y满足√(x+3y-1)+| 2x-y-9 |=0求5/4x+4的平方根.
已知x,y满足√(x+3y-1)+| 2x-y-9 |=0求5/4x+4的平方根.

已知x,y满足√(x+3y-1)+| 2x-y-9 |=0求5/4x+4的平方根.
√(x+3y-1)+| 2x-y-9 |=0
∴﹛x+3y-1=0
2x-y-9=0
解得x=4,y=-1
5/4x+4
=5+4
=9
∴5/4x+4的平方根=±√9=±3