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What is the minimum value of the following function f(x) =5x^2 - 10x + 3?

What is the minimum value of the following function f(x) =5x^2 - 10x + 3?-example-1
User Ahmar
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1 Answer

24 votes
24 votes

Answer: -2

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Step-by-step explanation:

The equation y = 5x^2-10x+3 is in the form y = ax^2+bx+c

a = 5

b = -10

c = 3

Use the values of 'a' and 'b' to compute the following

h = -b/(2a)

h = -(-10)/(2*5)

h = 1

This is the x coordinate of the vertex point. Use this to find the y coordinate of the vertex.

y = 5x^2-10x+3

y = 5*1^2-10*1+3

y = -2

The vertex is located at (1, -2)

This is the lowest point since a = 5 is a positive value

Positive values of 'a' mean the parabola opens upward, and we have a lowest point at the bottom of the parabola.

So the input x = 1 leads to the smallest output y = -2.

This is the smallest or minimum value of f(x).

What is the minimum value of the following function f(x) =5x^2 - 10x + 3?-example-1
User Jakob Gade
by
3.3k points