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數學叻既入一入(中四數應該)

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數學叻既入一入(中四數應該)

Find the equation of the axis of symmetry and the coordinates of the vertex of the graph of the function y=4x^2 - 8x + 2. Find the minimum and the maximum value of this function.

只求條公式... 失憶了

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-,-''
我覺得應該係
-b+/- (-b^2-4(a)(c)
               /
              2a

上面答果D咩黎-_-''

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