Speak in English please. I would be more pleased to help if you write in English.
Answer:
If you mean 4x-x=(x+4), x= 2
Step-by-step explanation:
The quadratic formula is -b + or - the square root of b squared - 4 times the a value and c value over 2a. So the roots would be -1.354249 and -6.645751. I believe these are the roots.