How do you simplify 3sqrt5+6sqrt5?

2 Answers
Mar 30, 2017

9sqrt5

Explanation:

When adding or subracting, the radicals have to be the same.

3sqrt5 +6sqrt5

Since 3 & 6 have the same radical, we simply add them.

(3+6)sqrt5

9sqrt5

sqrt5 cannot be written in any simpler form so our answer is

9sqrt5

Mar 30, 2017

9sqrt5

Explanation:

We can add/subtract radicals in the same way we add/subtract like algebraic terms.

"That is "color(red)(3)x+color(red)(6)x=(color(red)(3+6))x=9x

rArrcolor(red)(3)sqrt5+color(red)(6)sqrt5=(color(red)(3+6))sqrt5=9sqrt5