SOLUTION: how to figure out the equation of the axis of symmetry from f(x)=4x^2 -12x +5

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Question 256368: how to figure out the equation of the axis of symmetry from f(x)=4x^2 -12x +5
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Complete the square.
f%28x%29=4x%5E2+-12x+%2B5
f%28x%29=4%28x%5E2-3x%29%2B5
f%28x%29=4%28x%5E2-3x%2B%289%2F4%29%29%2B5-4%289%2F4%29
f%28x%29=4%28x-%283%2F2%29%29%5E2-4

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x=3/2 is the axis of symmetry.