a,b are vectors
If (a+b) . (a-b) = 15 and b vector is unit vector , then |a| vector is
(i) 3 (ii) 4 (iii) 5 (iv) 6
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4
Step-by-step explanation:
Vvvbbbbbvvvvvvvvbbbbbb gvbllkjhgggg
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