Simplify by removing a factor equal to one.?

1 ⤊

x^2 - 9
5x + 15

2007-10-28 12:03:43 · 2 answers · asked by Pep C 1 in Science & Mathematics ➔ Mathematics

factor
(x +3)(x -3)/5(x+3) Remove the (x + 3)/(x + 3) which is = 1
=(x-3)/5

2007-10-28 12:08:51 · answer #1 · answered by Linda K 5 · 1⤊ 0⤋

x^2 - 9 = (x-3)(x+3)
5x + 15 = 5(x+3)
If you meant (x^2-9)/(5x+15), then we have
(x-3)/5 since (x+3)/(x+3) = 1

2007-10-28 12:09:50 · answer #2 · answered by ironduke8159 7 · 0⤊ 1⤋