# Algebra help!!

How does rationalizing the denominator use the form of 1?

1. 👍 0
2. 👎 0
3. 👁 20
1. you can always multiply by 1 without changing the value. So, you want something that makes the denominator rational.

(3+√7)/(2-√7) * (2+√7)/(2+√7)
= (3+√7)(2+√7) / (2-√7)(2+√7)
= (13+5√7)/-3

(2-3i)/(6+i) * (6-i)/(6-i)
= (2-3i)(6-i) / (6+i)(6-i)
= (15-20i)/37

1. 👍 0
2. 👎 0
posted by Steve

## Similar Questions

1. ### Math help

How does rationalizing the denominator use the form of 1?

asked by Jessica on October 14, 2017
2. ### college math 209

write in simplified radical form by rationalizing the denominator 2ã5 + 3/ã5 - 1

asked by Anonymous on January 16, 2011
3. ### Algebra

The ratio of the areas of two squares is 32/63. After rationalizing the denominator, the ratio of their side lengths can be expressed in the simplified form (a*sqrt b)/c where a, b, and c are integers. What is the value of the sum

asked by Martin on July 23, 2016
4. ### Calculus

About rationalizing denominator, is it true that you can't always multiply by the same square root denominator to get a perfect square?

asked by -Untamed- on October 4, 2011
5. ### geometry

simplify by rationalizing the denominator: 18 ``√6````

asked by hector sanchez on August 24, 2011
6. ### Math

Simplify 4sqrt6/sqrt30 by rationalizing the denominator

asked by Math on May 11, 2014
7. ### Algebra

Simplify 4*sqrt6/sqrt30 by rationalizing the denominator. 4√6/√30 4√(6/30) 4√(1/5) 4/√5 4√5/5 Am I right?

asked by Student on May 2, 2018
8. ### algebra

Did you hear about... (answer) Pg 211 Pizazz Algebra Rationalizing the denominator

asked by HW help on March 20, 2009
9. ### Algebra

Simplify 4sqrt6/ sqrt30 by rationalizing the denominator. Need help can someone show me steps on how to do this

asked by Lane on May 19, 2018
10. ### Algebra

How to solve this problem by rationalizing the denominator? Steps please. 4sqrt6/sqrt30

asked by Kaai97 on May 12, 2016

More Similar Questions