The laplace transform of (t² – 2t) u (t – 1) is

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The laplace transform of (t² – 2t) u (t – 1) is

1. 2 e^-s - 2 e^-s
  s³ s²
2. 2 e^-2s - 2 e^-s
  s³ s²
3. 2 e^-s - 1 e^-s
  s³ s
4. none of these

Correct Option: C

[(t² - 2t)u(t -1)] = (t - 1)² u (t - 1) - u(t - 1)]

=	2	e^-s -	e^-s
	s³		s