Question

under root 2 X square + 4 x + 2 root 2 is equal to zero

Answer 1

it is a quadratic equation

Answer 2

I think you want to find the value of x. You can do this by three methods:
1. Factorisation method.
2. Completing the square method.
3. Quadratic formula.

The most easiest method is Factorisation method. So, I am gonna solve this sum by this method. In this method you need to split the middle term in such a manner that you can take common terms for finding the values of x.

Hope that helped. If satisfied please mark as Brainlist. Thanks.