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What is the vertex of #y= x^2-9x+14 #?

1 Answer

Apr 5, 2018

(4.5,-4.9)

Explanation:

#ax^2+bx+c# is the general quadratic equation and #-b/(2a)# will give the X coordinate of the line of symmetry/the maximum or minimum point.

Substitute this value into the equation to find the #y# value

#x^2-9x+14# #=>#. #(--9)/2# =#9/2# =4.5

#(4.5)^2-9xx4.5+14#

=-4.9

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