Find the value of
(ā+b)x(ā-b)=
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Explanation:
(a+b)×(a-b)=a×a -b×b +b×a -a×b
= 0 -0 +2(b×a)
=2(b×a)
[where a×a is equal to zero as the angle of a vector to itself is zero and -(a×b) = (b×a) .]
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