Quadratic Evaluation B321Ed
1. The problem is to find the value of the function $y = 2x^2 - 3x + 5$ when $x = 4$.
2. The formula given is a quadratic function: $$y = 2x^2 - 3x + 5$$ where $x$ is the input variable and $y$ is the output.
3. To find $y$ at $x=4$, substitute $4$ into the equation:
$$y = 2(4)^2 - 3(4) + 5$$
4. Calculate the powers and products:
$$y = 2 \times 16 - 12 + 5$$
5. Simplify step-by-step:
$$y = 32 - 12 + 5$$
$$y = 20 + 5$$
$$y = 25$$
6. Therefore, the value of the function at $x=4$ is $25$.