anyone know the answer: it’s an iq test and the video didn’t give the answer (sorry abt the phone)

Answer:
Hi! It is 4.
Step-by-step explanation:
The pattern is if x+x=y.
Then the answer is y=2x(x-1)
So, 2*2 equals to 4. 4*1 = 4, so the answer is 4.