- Thread starter Katie1
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- Jun 18, 2007

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Say you want find LCD of 3 and 15Katie1 said:I am having problems doing this, I can do the simple ones such as[3/4b^2+5/3b^3

But when I get to 2x/(x^2+5x+6)-4/(x-2) I get lost.

LCD for (x^2+5x+6)=(x-2)(x-3)

LCD for (x-2)= (x-2)

So the LCD= (x-2)(x-3)-----------Yes?

3 = 3

15 = 3 * 5

LCD(3,5) = 3*5 = 15

Say you want find LCD of 9 and 15

9 = 3 * 3

15 = 3 * 5

LCD(3,5) = 3*3 *5 = 45