the answer is 10√2x
I got this by first simplifying the radicals
√50x simplifies to √25 × √2x
the √25 is a square root of 5 so then i can multiply it to the 3, and it becomes 15√2x
Then √32x becomes √16 × √2x which the √16 becomes 4, gets multiplied by the 6 and becomes 24√2x
since the whole expression has √2x in common, you can factor that out. so it becomes.... √2x(1-15+24)= 10√2x