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Question 1203c
Vectors I: Basics, Dot and Cross Products
Algebra III
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Given that
∣
a
∣
=
4
,
{|\mathbf{a}|=4,}
∣
a
∣
=
4
,
b
{\mathbf{b}}
b
is a unit vector, and the angle between the the vectors is
12
0
∘
,
{120^\circ,}
12
0
∘
,
what is the value of
(
2
a
−
3
b
)
⋅
(
a
−
b
)
?
(2 \mathbf{a} - 3 \mathbf{b})\cdot(\mathbf{a} - \mathbf{b})?
(
2
a
−
3
b
)
⋅
(
a
−
b
)?
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Your answer:
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