Mathematics · Vector Algebra
Determine the magnitudes |a| and |b| of two vectors a and b, if (a + b) · (a - b) = 8 and |a| = 8|b|.
- 18√33√7, 2√33√7
- 216√63√7, 2√23√7
- 38√23√7, 2√23√7
- 416√23√7, 2√23√7✓
Correct answer
16√23√7, 2√23√7
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