It looks like you're working with a mathematical expression involving the function $f(x) = -3x^2 + 4x + 5$. However, the way the expression is written is a bit unclear, particularly with the terms "f(x) - f," "f(x) = 2," "T = f," and "T = constriction."

Let's break it down based on what I understand:

1. Function: $f(x) = -3x^2 + 4x + 5$.

2. Expression Involving $f(x)$: It seems you might be trying to subtract a value or another function from $f(x)$. Could you clarify what you meant by "f(x) - f"?

3. Condition $f(x) = 2$: If you're setting $f(x) = 2$, we can solve for $x$ by setting the equation equal to 2 and solving: $-3x^2 + 4x + 5 = 2$ Simplifying: $-3x^2 + 4x + 3 = 0$ This is a quadratic equation. You can use the quadratic formula to solve for $x$.

4. T = constriction: The term "T = constriction" seems to refer to some constraint or transformation, but I would need more context to understand what exactly this refers to.

If you could provide a bit more detail about the expression and the terms you are using, I can guide you through solving it.

Do you want me to go ahead and solve for $x$ where $f(x) = 2$?

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Related questions you might find helpful:

1. What is the process of solving quadratic equations using the quadratic formula?
2. How do transformations like translations or reflections affect the graph of a quadratic function?
3. What is the vertex form of a quadratic equation, and how do you convert to it?
4. How do you calculate the discriminant of a quadratic equation, and what does it tell you?
5. What does "constriction" refer to in the context of functions?

Tip: When solving quadratic equations, always first check if you can factor the expression before jumping straight to the quadratic formula.