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y la segunda es x1=5 y x2=3
a=5
b=-13
c=16
-
13+√(169- 320)/10 sale negativa no tiene solucion
x²-8x+15=0
a=1
b=-8
c=15 8+-√(64-6o)/2
(8+2)/2=5
(8-2)/2==3