# How do you find the LCD of #(2-y^2)/(y^2-49 )#, #(y-4)/(y+7)#?

##### 1 Answer

See the solution process below:

#### Explanation:

The denominator for the fraction on the left is a special form of the quadratic:

If we let:

Therefore:

So, the lowest common denominator is:

And to put the fraction on the right over the common denominator we need to multiply it by the appropriate form of