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Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

Anudeep wait... i'll be commenting soon, actually yup, we should answer in constant terms not in term of "x"

Just multiply the all the factors and assume that it is of the form (x^2 + 8ax + ca^2)^2 for some constant c. Now compare both the expression and solve it for c as i did in last question you asked. this will give c = 11. Thus the constant term is c^2 * a^4 so it equal to 121a^4 and in the question we have 105a^4 so we need to add 16a^4

I hope you can do the comparisons as I did it in one of the question you asked

(x+a)(x+7a)(x+3a)(x+5a) (x²+8ax+7a²)(x²+8ax+15a²) now if they are to be perfect square then we must make each expression a sqaure by themselves so we add and subtract by the opposite (x²+8ax+7a²)(x²+8ax+15a²)-(x²+8ax+7a²)8a² taking common we have (x²+8ax+7a²)(x²+8ax+15a²-8a²) (x²+8ax+7a²)(x²+8ax+7a²)= (x²+8ax+7a²)² similarly we have (x²+8ax+7a²)(x²_8ax+15a²)+(x²+8ax+15a²)8a² (x²+8ax+15a²)(x²+8ax+7a²+8a²)= (x²+8ax+15a²)²