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The line x=4 is an axis of symmetry of the graph of y=ax^2+bx+c. Find b/a.

 Mar 21, 2021
 #1
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By the quadratic axis of symmetry, b/a = -2.

 Mar 21, 2021
 #2
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Actually

 

-b/(2a)=4

 Mar 21, 2021

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