Mathematics for IGCSE & O level - Sketching Curves (Section 4 - No. 31)
Which is the equation for the line of symmetry of \(y=x^2 - 4x + 7\)?
x = 2
x = -2
y = 2
y = -2
Explanation
Complete the square: y=(x-2)^2 + 3. The line of symmetry is x=2.
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