Answer: The answer is 15a^4+a^3-18a^6-5a-7
Explanation:
Step 1: (5a^2+2a-7) (3a^2-a+1)
Step 2: 5a^2(3a^2-a+1) +2a(3a^2-a+1)-7(3a^2-a+1) multiply
Step 3: 15a^4-5a^3+5a^2+6a^3-2a^2+2a-21a^2+7a-7 (Combine like terms
Step: 4 15a^4+a^3-18a^6-5a-7
So first we write the equation then we take the the first polynomial equation and multiply it by the second. After that we multiplied everything combine like terms and simplify to the lowest terms possible!
Hope this helps! :D