Sarthaks APP
+1 vote
1.6k views
in Physics by (2.8k points)

The value of ((A) + (B)) ×  ((A) - (B)) is 

A. 0

B. A2-B2

C. (B)×(A)

D. 2((B)×(A))

by (2.8k points)
In the Q. and the last 2 options A and B represent vectors not magnitude

1 Answer

+1 vote
by (2.4k points)
selected by
 
Best answer

(A+B)×(A-B)

=(A+B)×A-(A×B)×B

=(A×A)+(B×A)-(A×B)-(B×B)

BCZ[A×(B−C)=A×B−A×C]

=(B×A)+(B×A)[BCZ A×A=0,A×B=-(B×A)]

=2(B×A)

ANSWER

Sarthaks APP

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.

Categories

...