# How do you factor completely #x^2-2xy-15y^2#?

##### 1 Answer

Jul 3, 2016

#### Explanation:

Looking at the given algebraic expression we recognize from the first two terms that to factor the expression we have to apply the property:

But in the given expression we need the term

Let's add

Checking the last step reached it is the difference of two squares that says:

where in our case:

Then,