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57.

e^(2x)-4e^x-5=0

(e^(x)-5)(e^(x)+1)=0

(e^(x)-5)=0 (e^(x)+1)=0

e^(x)=5 e^(x)=-1

x ln(e)= ln(5) x ln(e)=ln(-1)

x = ln(5) x = error

57-60 you have to break it down defactor I forget the official term figure out (this)(times this) sorry if I used this wrong

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