1. **State the problem:** Simplify the expression $4 - 9(4 - 9)$.
2. **Apply the order of operations:** First, solve inside the parentheses.
$$4 - 9$$
$$= -5$$
3. **Substitute back into the expression:**
$$4 - 9(-5)$$
4. **Multiply:**
$$9 \times (-5) = -45$$
5. **Rewrite the expression:**
$$4 - (-45)$$
6. **Subtracting a negative is adding:**
$$4 + 45 = 49$$
7. **Final answer:**
$$\boxed{49}$$
Simplify Expression Fc58Fe
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