No products in the cart.

Simplify. . 4-✓5 /4+✓5 + 4+✓5/4-✓5

CBSE, JEE, NEET, CUET

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

Install Now

Simplify. . 4-✓5 /4+✓5 + 4+✓5/4-✓5

Posted by Chinky Bhan 6 years ago

CBSE > Class 09 > Mathematics

1 answers

Sia ? 6 years ago

$\frac { 4 + \sqrt { 5 } } { 4 - \sqrt { 5 } } + \frac { 4 - \sqrt { 5 } } { 4 + \sqrt { 5 } }$
$= \frac { ( 4 + \sqrt { 5 } ) ( 4 + \sqrt { 5 } ) + ( 4 - \sqrt { 5 } ) ( 4 - \sqrt { 5 } ) } { ( 4 - \sqrt { 5 } ) ( 4 + \sqrt { 5 } ) }$
$= \frac { ( 4 + \sqrt { 5 } ) ^ { 2 } + ( 4 - \sqrt { 5 } ) ^ { 2 } } { ( 4 - \sqrt { 5 } ) ( 4 + \sqrt { 5 } ) }$
$= \frac { \left\{ ( 4 ) ^ { 2 } + 2 ( 4 ) ( \sqrt { 5 } ) + ( \sqrt { 5 } ) ^ { 2 } \right\} + \left\{ ( 4 ) ^ { 2 } - 2 ( 4 ) ( \sqrt { 5 } ) + ( \sqrt { 5 } ) ^ { 2 } \right\} } { ( 4 ) ^ { 2 } - ( \sqrt { 5 } ) ^ { 2 } }$
$= \frac { ( 16 + 8 \sqrt { 5 } + 5 ) + ( 16 - 8 \sqrt { 5 } + 5 ) } { 16 - 5 } = \frac { 42 } { 11 }$

4Thank You

ANSWER

Related Questions

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Posted by Sheikh Alfaz 1 week, 3 days ago

CBSE > Class 09 > Mathematics

0 answers

X³-12x²+39x-28

Posted by Sukhi Devasi 11 months ago

CBSE > Class 09 > Mathematics

0 answers

The polynomial of the type ax²+bx+c,a=0 is called

Posted by Duruvan Sivan 3 weeks, 1 day ago

CBSE > Class 09 > Mathematics

0 answers

sides of a triangle are in the ratio of 12:17:25 and its perimeter is 540cm. find its area

Posted by Akhilesh Patidar 11 months ago

CBSE > Class 09 > Mathematics

0 answers

2x²+[1×(8x²)^-1]+1

Posted by Less Goo 11 months ago

CBSE > Class 09 > Mathematics

0 answers

Cost of a pen is two and half times the cost of a pencil. Express the situation as a linear equation in two variables

Posted by Kirshika Ganesh 4 months, 1 week ago

CBSE > Class 09 > Mathematics

0 answers

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Posted by Yash Pandey 3 weeks, 1 day ago

CBSE > Class 09 > Mathematics