2007-12-29 09:57:29 · 4 answers · asked by ppd232 1 in Education & Reference ➔ Homework Help
The x^2 - 49 is a difference of squares.
x^2 - 49 = (x + 7)(x - 7)
The answer is:
-1 / (x - 7)^3
Good luck in your studies,
~ Mitch ~
2007-12-29 10:10:20 · answer #1 · answered by Mitch 7 · 0⤊ 2⤋
(x + 7) / (x - 7) divided by (x^2 - 49) / (7 - x)
is the same thing as
(x + 7) / (x - 7) multiplied by (7 - x) / (x^2 - 49)
first let's simplify the second part:
(7 - x) / (x^2 - 49)
= (7 - x) / [ (x - 7) * (x + 7) ]
= -1 / (x + 7)
so then we have
(x + 7) / (x - 7) * -1 / (x + 7)
= -1 / (x - 7)
your answer is
-1 / (x - 7)
Hope this helps.
2007-12-30 06:13:19 · answer #2 · answered by Chris W 4 · 1⤊ 0⤋
x+7/x-7 / x-7 x+7/ 7-x
(x+7)/(x-7) * 7-x/ (x-7)(x+7)
1/x-7
2007-12-29 22:18:46 · answer #3 · answered by Dave aka Spider Monkey 7 · 0⤊ 2⤋
divided by vuol dire =? OPPURE : ?? rispondi e io te la risolvo....
2007-12-29 18:07:02 · answer #4 · answered by emy11 3 · 0⤊ 2⤋