Asked by mary

e^-2x(-e^-x)- (e^-x)(-2e^-2x)

thanks

Answers

Answered by drwls
Assuming that you mean
(e^-2x)(-e^-x)- (e^-x)(-2e^-2x)

that would be
-e^(-3x) - (-2e^-3x) = e^(-3x)

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