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Problem
Problem
If
a
and
b
are two vectors, then the value of
(
a
+
b
)
×
(
a
−
b
)
(\mathbf{a} + \mathbf{b}) \times (\mathbf{a} - \mathbf{b})
(
a
+
b
)
×
(
a
−
b
)
is a.
2
(
b
×
a
)
2(\mathbf{b} \times \mathbf{a})
2
(
b
×
a
)
b.
−
2
(
b
×
a
)
-2(\mathbf{b} \times \mathbf{a})
−
2
(
b
×
a
)
c.
b
×
a
\mathbf{b} \times \mathbf{a}
b
×
a
d.
a
×
b
\mathbf{a} \times \mathbf{b}
a
×
b
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