Question: Evaluate 2x^0 - 3x for x = 4.
1. **State the problem:** We need to evaluate the expression $$2x^0 - 3x$$ when $$x = 4$$.
2. **Recall the rules:** Any number raised to the power of zero is 1, so $$x^0 = 1$$ for any $$x \neq 0$$.
3. **Substitute the value:** Replace $$x$$ with $$4$$ in the expression:
$$2 \times 4^0 - 3 \times 4$$
4. **Simplify powers:** Since $$4^0 = 1$$, the expression becomes:
$$2 \times 1 - 3 \times 4$$
5. **Calculate multiplication:**
$$2 - 12$$
6. **Final subtraction:**
$$2 - 12 = -10$$
**Answer:** The value of the expression when $$x = 4$$ is $$-10$$.