x^2+4x-21/x-3?

3 ⤊

2007-03-22 16:32:01 · 3 answers · asked by motevoli 2 in Science & Mathematics ➔ Mathematics

3 answers

(x^2 + 4x - 21) / (x - 3)

Factor the top.

(x + 7)(x - 3) / (x - 3)

Cancel the common factor.

(x + 7)

2007-03-22 16:35:18 · answer #1 · answered by Puggy 7 · 1⤊ 0⤋

Factor the numerator

x^2+4x-21/x-3
(x+7)(x-3)/(x-3)
x+7

2007-03-22 23:35:25 · answer #2 · answered by ecolink 7 · 1⤊ 0⤋

The numerator is a trinomial. It needs to be factored. Therefore, the numerator is (x - 3)(x + 7) FOIL it and you will see the trinomial. So now you have (x - 3)(x + 7)/x - 3
Simplify and you now have x + 7

2007-03-22 23:37:22 · answer #3 · answered by Christi 4 · 1⤊ 0⤋