f(x) = a(x^2 - 6x + 9) - 5 = ax^2 - 6ax + 9a - 5
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- The vertex form of a quadratic function is \( f(x) = a(x - h)^2 + k \), where \( (h, k) \) is the vertex. Given \( h = 3 \) and \( k = -5 \), we have:
- f(x) = a(x - 3)^2 - 5
- We are also given \( b = -6 \). We rewrite the standard form \( f(x) = ax^2 + bx + c \) in vertex form by expanding:
- Comparing coefficients with \( ax^2 + bx + c \), we identify:
- \( b = -6a \)
- \( c = 9a - 5 \)
