Question: 5y(2y+3)-4y
1. **State the problem:** Simplify $5y(2y+3)-4y$.
2. **Use the distributive property:**
$$5y(2y+3)=5y\cdot 2y+5y\cdot 3$$
$$=10y^2+15y$$
3. **Rewrite the expression:**
$$10y^2+15y-4y$$
4. **Combine like terms:**
$$15y-4y=11y$$
$$10y^2+11y$$
5. **Final answer:**
$$10y^2+11y$$