# Math Help - polynomial common denominators

1. ## polynomial common denominators

I believe I have it right that the common factor of x^2+6x+8 and x^2+2x would be x^2 + 2x. If not let me know.......

But if those 2 terms were denominators of fractions what is the least common denominator?

2. Originally Posted by galanm
I believe I have it right that the common factor of x^2+6x+8 and x^2+2x would be x^2 + 2x. If not let me know.......
nope

But if those 2 terms were denominators of fractions what is the least common denominator?
$x^2 + 6x + 8 = (x + 2)(x + 4)$ and $x^2 + 2x = x(x + 2)$

thus, if combining two fractions with those quadratics as the denominators, the least common denominator would be: $x(x + 2)(x + 4)$

3. Originally Posted by galanm
I believe I have it right that the common factor of x^2+6x+8 and x^2+2x would be x^2 + 2x. If not let me know.
To learn how to factor the second polynomial, try here.

To learn how to factor the first polynomial, try here.