Question: factor each polynomial using the greatest common factor $15a-15a^2$
1. **State the problem:** Factor the polynomial $$15a - 15a^2$$ using the greatest common factor (GCF).
2. **Identify the GCF:** The terms are $$15a$$ and $$15a^2$$.
- The numerical GCF of $$15$$ and $$15$$ is $$15$$.
- The variable part common to both terms is $$a$$ (since $$a^1$$ and $$a^2$$ share $$a^1$$).
- Therefore, the GCF is $$15a$$.
3. **Factor out the GCF:**
$$15a - 15a^2 = 15a(\frac{15a}{15a} - \frac{15a^2}{15a})$$
4. **Simplify inside the parentheses:**
$$= 15a(1 - \cancel{15a}/\cancel{15a} \times a) = 15a(1 - a)$$
5. **Final factored form:**
$$15a - 15a^2 = 15a(1 - a)$$
This means the polynomial is factored by taking out the greatest common factor $$15a$$ and leaving the remaining terms inside the parentheses.