How do you evaluate 9 + 2*squareroot(5)?

1 Answer
mason m
Nov 21, 2015

#9+2sqrt5=13.472#

Explanation:

#9+2sqrt5#

#sqrt5# is an irrational number—it is a never-ending decimal that can't be written as a fraction. You must use a calculator to determine its value.
(It is equal to about #2.2360679774997896964091736687312762#)...

We will round it to the thousandth place.

#9+2(2.236)=9+4.472=13.472#

Related questions
See all questions in Addition and Subtraction of Radicals
Impact of this question
1416 views around the world
You can reuse this answer
Creative Commons License