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

Question

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

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 , the function does not have any x x values for which f(x) < 0 .

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

Answer

The function has no negative values.