Join Sarthaks eConnect Today - Largest Online Education Community!
0 votes
asked in Mathematics by (25 points)
recategorized by

(a + b)2 = 

2 Answers

+1 vote
answered by (298k points)
selected by
Best answer

Taking LHS of the identity: 
(a + b)2 

This can also be written as: 
= (a + b) (a + b) 

Multiply as we do multiplication of two binomials and we get: 
= a(a + b) + b(a + b) 
= a2 + ab + ab + b2 

Add like terms and we get: 
= a2 + 2ab + b2 

Rearrange the terms and we get: 
= a2 + b2 + 2ab 

Hence, in this way we obtain the identity i.e. (a + b)2 = a2 + b2 + 2ab

+2 votes
answered by (129 points)


Related questions

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

One Thought Forever

“There is a close connection between getting up in the world and getting up in the morning.“
– Anon