y=< 2⁴. (y= 7 ) x<y (x=8) z-x *y= z=
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x2+2bx+b2−ba2−2ba−b=0
(1)⋅x2+(2b)⋅x+(b2−ba2−2ba−b)=0
x=−(2b)±(2b)2−4⋅(b2−ba2−2ba−b)
x=−2b±4b2−(4b2−4ba2−8ba−4b)
x=−2b±4ba2+8ba+4b
x=−2b±(2a+2)⋅b√2
x=(2)⋅[(−b)±(a+1)⋅b√](2)
x1=−b+(a+1)⋅b√
x2=−b−(a+1)⋅b√
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