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Which of the following equation is a quadratic function?

a. 5x^2 -2x + 4 = 0
b. y = 2x + 3
c. f(x) = x^2
d. x = y^2 -3y + 4​


Sagot :

Answer:

. 5x^2-2x+4= 0

Step-by-step explanation:

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