# How do you multiply #[a^(1/2) + 6^(1/2)] [a^(1/2) - 6^(1/2)]#?

##### 1 Answer

Apr 10, 2015

You could multiply out out using FOIL, or whatever idea you've been taught for multiplying binomials.

It's quicker to recognize that this product is of the form:

(The product of a sum and difference equals the difference of the squares.)

Now realize that

**OR**