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D( p )
p^2-(3*p)-70 = 0
p-10 = 0
p^2-(3*p)-70 = 0
p^2-(3*p)-70 = 0
p^2-3*p-70 = 0
p^2-3*p-70 = 0
DELTA = (-3)^2-(-70*1*4)
DELTA = 289
DELTA > 0
p = (289^(1/2)+3)/(1*2) or p = (3-289^(1/2))/(1*2)
p = 10 or p = -7
p-10 = 0
p-10 = 0
p-10 = 0 // + 10
p = 10
p in (-oo:-7) U (-7:10) U (10:+oo)
(5*p-4)/(p^2-(3*p)-70)-(3/(p-10)) = 0
(5*p-4)/(p^2-3*p-70)-3*(p-10)^-1 = 0
(5*p-4)/(p^2-3*p-70)-3/(p-10) = 0
p^2-3*p-70 = 0
p^2-3*p-70 = 0
p^2-3*p-70 = 0
DELTA = (-3)^2-(-70*1*4)
DELTA = 289
DELTA > 0
p = (289^(1/2)+3)/(1*2) or p = (3-289^(1/2))/(1*2)
p = 10 or p = -7
(p+7)*(p-10) = 0
(5*p-4)/((p+7)*(p-10))-3/(p-10) = 0
(5*p-4)/((p+7)*(p-10))+(-3*(p+7))/((p+7)*(p-10)) = 0
5*p-3*(p+7)-4 = 0
2*p-25 = 0
(2*p-25)/((p+7)*(p-10)) = 0
(2*p-25)/((p+7)*(p-10)) = 0 // * (p+7)*(p-10)
2*p-25 = 0
2*p-25 = 0 // + 25
2*p = 25 // : 2
p = 25/2
p = 25/2
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