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21-04-2021
Mathematics

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Enter an equation for the line of symmetry for the function f (x) = 5x^2 – 20x + 3.

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cwrw238 cwrw238

21-04-2021

Answer:

x = 2.

Step-by-step explanation:

First convert to vertex form:

f(x) = 5x^2 - 20x + 3

= 5(x^2 - 4x) + 3

= 5 [(x - 2)^2 - 4] + 3

= 5(x - 2)^2 -20 + 3

= 5(x - 2)^2 - 17.

The line of symmetry is x = 2.

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