已知a方-4a+b方-b/2 +65/16=0,求a方-4√b.各位大哥大姐快啊!急············

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已知a方-4a+b方-b/2 +65/16=0,求a方-4√b.各位大哥大姐快啊!急············

已知a方-4a+b方-b/2 +65/16=0,求a方-4√b.各位大哥大姐快啊!急············
已知a方-4a+b方-b/2 +65/16=0,求a方-4√b.
各位大哥大姐快啊!急············

已知a方-4a+b方-b/2 +65/16=0,求a方-4√b.各位大哥大姐快啊!急············
a方-4a+b方-b/2 +65/16=0,
a^2-4a+4+b^2-b/2+1/16=0;
(a-2)^2+(b-1/4)^2=0;
a=2;b=1/4;
a方-4√b.=4-2=2.