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D( a )
24*a-(6*a^2) = 0
24*a-(6*a^2) = 0
24*a-(6*a^2) = 0
24*a-6*a^2 = 0
24*a-6*a^2 = 0
DELTA = 24^2-(-6*0*4)
DELTA = 576
DELTA > 0
a = (576^(1/2)-24)/(-6*2) or a = (-576^(1/2)-24)/(-6*2)
a = 0 or a = 4
a in (-oo:0) U (0:4) U (4:+oo)
(2*a^2-(16*a)+32)/(24*a-(6*a^2)) = 0
(2*a^2-16*a+32)/(24*a-6*a^2) = 0
2*a^2-16*a+32 = 0
2*(a^2-8*a+16) = 0
a^2-8*a+16 = 0
DELTA = (-8)^2-(1*4*16)
DELTA = 0
a = 8/(1*2)
a = 4 or a = 4
2*(a-4)^2 = 0
24*a-6*a^2 = 0
6*a*(4-a) = 0
4-a = 0 // - 4
-a = -4 // * -1
a = 4
6*a*(a-4) = 0
(2*(a-4)^2)/(6*a*(a-4)) = 0
a-4 = 0 // + 4
a = 4
a in { 4}
a belongs to the empty set
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