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Mathematics
Mathematics
Problem
7. Evaluate the product
(
3
a
⃗
−
5
b
⃗
)
⋅
(
2
a
⃗
+
7
b
⃗
)
(3 \vec{a}-5 \vec{b}) \cdot(2 \vec{a}+7 \vec{b})
(
3
a
−
5
b
)
⋅
(
2
a
+
7
b
)
.
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