Question
Mathematics Question on Vector Algebra
If ∣aˉ∣=10 and ∣bˉ∣=5, then the value of (aˉ+2bˉ)⋅(aˉ−2bˉ) is equal to
A
32
B
16
C
8
D
4
E
0
Answer
0
Explanation
Solution
The correct option is (E) : 0
If ∣aˉ∣=10 and ∣bˉ∣=5, then the value of (aˉ+2bˉ)⋅(aˉ−2bˉ) is equal to
32
16
8
4
0
0
The correct option is (E) : 0