Can someone tell me if I solved this correctly?
Nakim simplified 3 times the square root of 2x plus x times the square root of 8x minus 5 times the square root of 18x and got -10x times the square root of 2x for an answer.

Part 1: Using complete sentences, explain what Nakim did wrong.

Part 2: Show all your work to simplify the expression.

Question

Can someone tell me if I solved this correctly?
Nakim simplified 3 times the square root of 2x plus x times the square root of 8x minus 5 times the square root of 18x and got -10x times the square root of 2x for an answer.

Part 1: Using complete sentences, explain what Nakim did wrong.

Part 2: Show all your work to simplify the expression.

anonymous · Answer

My Answer: 
He added "3 + 2x + -15" and says he got "-10x". But it is wrong because you can`t add 3 to 2x same for -15. So he was not paying attention to the "2x". 

Real Solution:

3√2x + x√8x - 5√18x
3√2x + 2x√2x - 15√2x
-12√2x + 2x√2x = Simplified?