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D( x )
x^2+2*x-15 = 0
x^2+2*x-15 = 0
x^2+2*x-15 = 0
x^2+2*x-15 = 0
DELTA = 2^2-(-15*1*4)
DELTA = 64
DELTA > 0
x = (64^(1/2)-2)/(1*2) or x = (-64^(1/2)-2)/(1*2)
x = 3 or x = -5
x in (-oo:-5) U (-5:3) U (3:+oo)
(((x^2+17*x+70)*(x^2-(2*x)-3))/(x^2+2*x-15))*(x^2+8*x-20) = 0
(((x^2+17*x+70)*(x^2-2*x-3))/(x^2+2*x-15))*(x^2+8*x-20) = 0
((x^2+17*x+70)*(x^2-2*x-3)*(x^2+8*x-20))/(x^2+2*x-15) = 0
x^2+17*x+70 = 0
x^2+17*x+70 = 0
DELTA = 17^2-(1*4*70)
DELTA = 9
DELTA > 0
x = (9^(1/2)-17)/(1*2) or x = (-9^(1/2)-17)/(1*2)
x = -7 or x = -10
(x+10)*(x+7) = 0
x^2-2*x-3 = 0
x^2-2*x-3 = 0
DELTA = (-2)^2-(-3*1*4)
DELTA = 16
DELTA > 0
x = (16^(1/2)+2)/(1*2) or x = (2-16^(1/2))/(1*2)
x = 3 or x = -1
(x+1)*(x-3) = 0
x^2+2*x-15 = 0
x^2+2*x-15 = 0
DELTA = 2^2-(-15*1*4)
DELTA = 64
DELTA > 0
x = (64^(1/2)-2)/(1*2) or x = (-64^(1/2)-2)/(1*2)
x = 3 or x = -5
(x+5)*(x-3) = 0
x^2+8*x-20 = 0
x^2+8*x-20 = 0
DELTA = 8^2-(-20*1*4)
DELTA = 144
DELTA > 0
x = (144^(1/2)-8)/(1*2) or x = (-144^(1/2)-8)/(1*2)
x = 2 or x = -10
(x+10)*(x-2) = 0
((x+10)^2*(x+7)*(x+1)*(x-3)*(x-2))/((x+5)*(x-3)) = 0
( x+10 )
x+10 = 0 // - 10
x = -10
( x+1 )
x+1 = 0 // - 1
x = -1
( x+7 )
x+7 = 0 // - 7
x = -7
( x-2 )
x-2 = 0 // + 2
x = 2
( x-3 )
x-3 = 0 // + 3
x = 3
x in { 3}
x in { -10, -10, -1, -7, 2 }
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