How do you simplify -4√10 + 6√40?

1 Answer
Oct 26, 2015

8sqrt(10

Explanation:

We want the same radical in each term to combine the two. We can simplify 6sqrt(40) by looking at is as 6sqrt(10*2*2). Take out the 2 and we get 12sqrt(10) while the other term -4sqrt(10) remains unchanged.

Now we just combine them together.

-4sqrt(10)+12sqrt(10)

rArr 8sqrt(10)