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📰 Solution: The maximum height occurs at the vertex. For $ y = -x^2 + 6x - 8 $, $ a = -1 $, $ b = 6 $, so $ x = -\frac{6}{2(-1)} = 3 $. Substitute $ x = 3 $: $ y = -(3)^2 + 6(3) - 8 = -9 + 18 - 8 = 1 $. The maximum height is $ 1 $ unit. \boxed{1} 📰 Question: Given $ f(2x + 1) = 4x^2 + 12x + 9 $, find $ f(x^2 - 3) $. 📰 Solution: Let $ u = 2x + 1 $, so $ x = \frac{u - 1}{2} $. Substitute into $ f(u) $: $ f(u) = 4\left(\frac{u - 1}{2}\right)^2 + 12\left(\frac{u - 1}{2}\right) + 9 = (u - 1)^2 + 6(u - 1) + 9 = u^2 - 2u + 1 + 6u - 6 + 9 = u^2 + 4u + 4 $. Thus, $ f(x^2 - 3) = (x^2 - 3)^2 + 4(x^2 - 3) + 4 = x^4 - 6x^2 + 9 + 4x^2 - 12 + 4 = x^4 - 2x^2 + 1 $. \boxed{x^4 - 2x^2 + 1} 📰 See How Stunning This Inter Milan Jersey Looks Shop Before Its Gone 7831899 📰 St Call 5609947 📰 Lateral Rectus 2074805 📰 Npi Lookyou The Secret Code Everyones Obsessed Withtry It Now 9751737 📰 The Great Wall Restaurant Where Every Bite Whispers Legend 1644719 📰 Ottoman Empire Map 9681025 📰 Youre Doing The Prone Bone Position Wrongand Its Ruining Your Back Forever 1620415 📰 Yahoo Finance Zs Exposed Click Here To Unlock Secrets Investors Are Ignoring 9848852 📰 Jim Abbot 6497619 📰 Block By Block Inside Blocks Ios Game Changing Secrets You Cant Ignore 9006226 📰 Also Rac12 Cdot 4 Cdot H 2H 8884348 📰 Hungarian In Spanish 649304 📰 Google Maps App Mac 1542059 📰 Your Macs Screen And Heat Are A Deadly Match Every Time 8741602 📰 You Wont Believe What Hides Inside This Maximum Ending Restaurants 2811932