Sagot :
Answer:
-12y^5
Step-by-step explanation:
1. Multiply first the constants (3 and - 4)
2. Multiply the variables. When multiplying variables, just add their exponents.
3. Then combine the evaluated constants and variables.
Solution:
3y^3 * - 4y^2 = (3*(-4))*y^(3+2)
=-12y^5