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D( y )
22-y < 0
22-y < 0
22-y < 0
22-y < 0
-y < -22 // * -1
y > 22
y in (-oo:22>
y-2 = (22-y)^(1/2) // - (22-y)^(1/2)
y-(22-y)^(1/2)-2 = 0
-(22-y)^(1/2) = y-2 // - y-2
-(22-y)^(1/2) = -(y-2) // ^ 2
abs(22-y) = (-(y-2))^2 // - (-(y-2))^2
abs(22-y)-(-(y-2))^2 = 0
y in (-oo:+oo)
abs(22-y)
22-y >= 0
22-y >= 0
-y >= -22 // * -1
y <= 22
y in (-oo:22>
22-(-(y-2))^2-y = 0
y in (22:+oo)
y-(-(y-2))^2-22 = 0
abs(22-y)-(-(y-2))^2 = 0
/ | 22-(-(y-2))^2-y = 0 i y in (-oo:22> | y-(-(y-2))^2-22 = 0 i y in (22:+oo)
y in (-oo:22>
22-(-(y-2))^2-y = 0
22-1*(2-y)^2-y = 0
22-1*(2-y)^2-y = 0
3*y-y^2-4+22 = 0
3*y-y^2+18 = 0
3*y-y^2+18 = 0
3*y-y^2+18 = 0
DELTA = 3^2-(-1*4*18)
DELTA = 81
DELTA > 0
y = (81^(1/2)-3)/(-1*2) or y = (-81^(1/2)-3)/(-1*2)
y = -3 or y = 6
(y+3)*(y-6) = 0
(y+3)*(y-6) = 0
( y+3 )
y+3 = 0 // - 3
y = -3
( y-6 )
y-6 = 0 // + 6
y = 6
y in (22:+oo)
y-(-(y-2))^2-22 = 0
y-1*(2-y)^2-22 = 0
y-1*(2-y)^2-22 = 0
5*y-y^2-22-4 = 0
5*y-y^2-26 = 0
5*y-y^2-26 = 0
5*y-y^2-26 = 0
DELTA = 5^2-(-26*(-1)*4)
DELTA = -79
DELTA < 0
1 = 0
1 = 0
y in { -3, 6 }
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