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If |a| = 1, |b| = 2 and the angle betwee...

If |a| = 1, |b| = 2 and the angle between a and b is 120, then `{(a + 3b) xx (3a - b)}^(2)` =

A

425

B

375

C

325

D

300

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The correct Answer is:
D
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