Mathematics · Quadratic Forms
Which of the following real quadratic forms on ℝ 2 is positive definite?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Q(X, Y) = XY
- 2Q(X, Y) = X 2 - XY + Y 2✓
- 3Q(X, Y) = X 2 + 2XY + Y 2
- 4Q(X, Y) = X 2 + XY
Correct answer
Q(X, Y) = X 2 - XY + Y 2
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