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Mathematics · Functions
Practice mode
Lesson 12 · Quadratic Functions +10 XP
f(x) = x² − 4x + 3 — what is the minimum value of f(x)?
Af(x) = −1
Bf(x) = 1
Cf(x) = 3
Df(x) = −3
✓ Correct! Complete the square: f(x) = (x − 2)² − 1, so the minimum is −1 at x = 2.
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