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What is the vertex of the graph of y = x^2 - 19x + 74?

 Feb 22, 2021
 #1
avatar+30677 
+2

-b/2a   will be the 'x' value        a = 1    b = -19

 

use this value in the equation to calculate the 'y' value of the vertex .....

 Feb 22, 2021
 #2
avatar+73 
+3


Anther way you can solve this is by completing the square...

 

then you can use the general formula ...

 

y = (x-h)^2 + (y-k)^2     where (h,k) is the vertex, 

Zenitsu  Feb 22, 2021
 #3
avatar+30677 
+1

I am sure you meant     y = a(x-h)^2 + k      where  h,k is the vertex     cheeky

ElectricPavlov  Feb 23, 2021
 #4
avatar+73 
+4

 

 

Sorry I was thinking of the Formula for the graph of a circle. 

Zenitsu  Feb 23, 2021

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