Answer:
The product is 9a^<u>8</u>+24a^4+16
Step-by-step explanation:
Since we have given that (<em>3a^4+4)^2</em>
As we know that (a+b)^2=a^2+2ab+b^2
So, it becomes, (3a^4 + 4)^2=(3a^4)^2+2\times 3a^4\times 4+(4)^2\\\\=9a^8+24a^4+16
Hence, the product is <em>9a^8+24a^4+16</em>