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D( Q )
Q = 0
Q = 0
Q = 0
Q in (-oo:0) U (0:+oo)
2*Q+10 = Q+100/Q+10 // - Q+100/Q+10
2*Q-Q-(100/Q)-10+10 = 0
2*Q-Q-100*Q^-1-10+10 = 0
1*Q^1-100*Q^-1 = 0
(1*Q^2-100*Q^0)/(Q^1) = 0 // * Q^2
Q^1*(1*Q^2-100*Q^0) = 0
Q^1
Q^2-100 = 0
Q^2-100 = 0
DELTA = 0^2-(-100*1*4)
DELTA = 400
DELTA > 0
Q = (400^(1/2)+0)/(1*2) or Q = (0-400^(1/2))/(1*2)
Q = 10 or Q = -10
Q in { -10, 10}
Q in { -10, 10 }
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