Practice Final Exam

t + 4	-  t
t + 2

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1 +	t - 4
	t2 - 4

t + 4	-  t   =	t + 4	-	t(t + 2)	=	t + 4 - (t2 + 2t)	=	t + 4 - t2 -2t	=	- t2 - t + 4
t + 2		t + 2		t + 2		t + 2		t + 2		t + 2

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1 +	t - 4	=	t2 - 4	+	t - 4	=	t2 - 4 + t - 4	=	t2 + t - 8
	t2 - 4		t2 - 4		t2 - 4		t2 - 4		t2 - 4

- t2 - t + 4

t + 2

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t2 + t - 8

t2 - 4

- t2 - t + 4	÷	t2 + t - 8
t + 2		t2 - 4

- t2 - t + 4	×	t2 - 4	=	- t2 - t + 4	×	(t - 2)(t + 2)	=	(t - 2) (- t2 - t + 4)
t + 2		t2 + t - 8		t + 2		t2 + t - 8		t2 + t - 8

  return