Theres a phy que below

Question

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

A. 0

B. A²-B²

C. (B)×(A)

D. 2((B)×(A))

Comments

In the Q. and the last 2 options A and B represent vectors not magnitude

Answer 1

(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