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Eliminating x from x² + 1/x² = m and x + 1/x = n, we get?

10th Class Federal Board Exams Quizzes MCQs Quizzes Federal Board Class 10th Math Chapter No 2

Question:
Eliminating x from x² + 1/x² = m and x + 1/x = n, we get

Option A):
m²-n²=-2
Option B):
m²+n²=2
Option C):
m²+n²=-2
Option D):
m²-n²=2

Correct Answer is Option A):
m²-n²=-2