Thread: raftional expression?

x²-x-12 . 3+x
x²-9 4-x

ans (x-4)(3+X)
(X-3)(4-X)

THERE IN THE BOOK IS (3+X)
(X-3)

Originally Posted by zbest1966

THERE IN THE BOOK IS (3+X)
(X-3)

Note that .

In general, .

Edit: I didn't look too closely at the book's answer, but the other two posters are correct when they say that it is wrong.

Originally Posted by zbest1966

x²-x-12 . 3+x
x²-9 4-x

ans (x-4)(3+X)
(X-3)(4-X)

THERE IN THE BOOK IS (3+X)
(X-3)

Both your answer and the book's answer are wrong.

Originally Posted by zbest1966

x²-x-12 . 3+x
x²-9 4-x

ans (x-4)(3+X)
(X-3)(4-X)

THERE IN THE BOOK IS (3+X)
(X-3)

I disagree the answer in the textbook.

It should be .

if you a negative on the top you must put a negative on the bottom.

Originally Posted by zbest1966

if you a negative on the top you must put a negative on the bottom.

Not true. What I have written is correct, I've just written so that you have a common factor you can cancel.