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D( b )
8-(2*b) < 0
6*b < 0
8-(2*b) < 0
8-(2*b) < 0
8-2*b < 0
8-2*b < 0 // - 8
-2*b < -8 // : -2
b > -8/(-2)
b > 4
6*b < 0
6*b < 0
6*b+0 < 0 // - 0
6*b < 0 // : 6
b < 0/6
b < 0
b in <0:4>
(6*b)^(1/2) = (8-(2*b))^(1/2) // - (8-(2*b))^(1/2)
(6*b)^(1/2)-(8-(2*b))^(1/2) = 0
(6*b)^(1/2)-(8-2*b)^(1/2) = 0
-(8-2*b)^(1/2) = 6^(1/2)*b^(1/2) // - 6^(1/2)*b^(1/2)
-(8-2*b)^(1/2) = -(6^(1/2)*b^(1/2)) // ^ 2
abs(8-2*b) = (-(6^(1/2)*b^(1/2)))^2 // - (-(6^(1/2)*b^(1/2)))^2
abs(8-2*b)-(-(6^(1/2)*b^(1/2)))^2 = 0
b in (-oo:+oo)
abs(8-2*b)
8-2*b >= 0
8-2*b >= 0 // - 8
-2*b >= -8 // : -2
b <= -8/(-2)
b <= 4
b in (-oo:4>
8-2*b-(-(6^(1/2)*b^(1/2)))^2 = 0
b in (4:+oo)
-(-2*b)-(-(6^(1/2)*b^(1/2)))^2-8 = 0
abs(8-2*b)-(-(6^(1/2)*b^(1/2)))^2 = 0
/ | 8-2*b-(-(6^(1/2)*b^(1/2)))^2 = 0 i b in (-oo:4> | -(-2*b)-(-(6^(1/2)*b^(1/2)))^2-8 = 0 i b in (4:+oo)
b in (-oo:4>
8-2*b-(-(6^(1/2)*b^(1/2)))^2 = 0
8-8*b = 0 // - 8
-8*b = -8 // : -8
b = -8/(-8)
b = 1
b in (4:+oo)
-(-2*b)-(-(6^(1/2)*b^(1/2)))^2-8 = 0
-4*b-8 = 0 // + 8
-4*b = 8 // : -4
b = 8/(-4)
b = -2
(4:+oo)
b = 1
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