Solve the Quadratic: Discover X in y=2x^2-4x+5 Where f(x) < 0

Look at the following function:

y=2x24x+5 y=2x^2-4x+5

Determine for which values of x x the following is true:

f(x)<0 f(x) < 0

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Step-by-step written solution

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1

Understand the problem

Look at the following function:

y=2x24x+5 y=2x^2-4x+5

Determine for which values of x x the following is true:

f(x)<0 f(x) < 0

2

Step-by-step solution

To find the values of x x where the function y=2x24x+5 y = 2x^2 - 4x + 5 is negative:

  • Step 1: Identify the direction of the parabola:
    Since a=2 a = 2 is positive, the parabola opens upwards, indicating that any potential minimum will be at the vertex.

  • Step 2: Find the vertex:
    The vertex is at x=b2a=42×2=1 x = -\frac{b}{2a} = -\frac{-4}{2 \times 2} = 1 .
    Substituting x=1 x = 1 back into the function gives: f(1)=2(1)24(1)+5=3 f(1) = 2(1)^2 - 4(1) + 5 = 3 .

  • Step 3: Determine if the function can be negative:
    Since the vertex provides the minimum value of the parabola and this value is positive f(1)=3>0 f(1) = 3 > 0 , the function does not have any x x values for which f(x)<0 f(x) < 0 .

Thus, the correct answer is that the function has no negative values.

3

Final Answer

The function has no negative values.

Practice Quiz

Test your knowledge with interactive questions

The graph of the function below intersects the X-axis at points A and B.

The vertex of the parabola is marked at point C.

Find all values of \( x \) where \( f\left(x\right) > 0 \).

AAABBBCCCX

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