/2a-1/+根号b-3=0,
则2a-1=0,b-3=0
则a=1/2,b=3
[(2a+b)^2-(2a-b)(2a+b)-8b]/2b
=[(2a+b)(2a+b-2a+b)-8b]/2b
=[(2a+b)*2b-8b]/2b
=2a+b-4
=1+3-4
=0
/2a-1/+根号b-3=0,
则2a-1=0,b-3=0
则a=1/2,b=3
[(2a+b)^2-(2a-b)(2a+b)-8b]/2b
=[(2a+b)(2a+b-2a+b)-8b]/2b
=[(2a+b)*2b-8b]/2b
=2a+b-4
=1+3-4
=0