Formulate an Algebraic Expression: Use Parameters a=1, b=-1, c=3

To solve this problem, we'll follow these steps:

• Step 1: Identify the provided coefficients for the expression of the form $ax^2 + bx + c$.
• Step 2: Substitute the provided values into the expression.

Now, let's perform these steps:

Step 1: The problem provides us with the coefficients $a = 1$, $b = -1$, and $c = 3$ for a quadratic expression $ax^2 + bx + c$.

Step 2: Substitute these values into the quadratic expression:

$a = 1$: Multiply $x^2$ by $1$, resulting in $x^2$.

$b = -1$: Multiply $x$ by $-1$, resulting in $-x$.

$c = 3$: The constant term is $3$.

Thus, the algebraic expression is:

$x^2 - x + 3$.

Comparing this result to the given choices, we find that this expression matches choice 3.

Therefore, the solution to the problem is $x^2 - x + 3$.