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設y=-(x-a)²+6=-x²+2ax+(6-a²)
當-x²+2ax+(6-a²)=0時
公式解x=-a±√6
A=(-a-√6,0) B=(-a+√6,0)
AB=2√6
Mathematics
Senior High
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想請問這題要怎麼算，謝謝
*10. 小琦在爺爺被白蟻蛀光的數學筆記本中發現這樣一個圖形,
C
6)
A A
B(
--x2 + x
試求出AB 的值,
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