Hi all, this is my first post

I'd like to know how to solve this integral in dx (i dont know how to use the forum tag MATH and if there is the integration symbol... sorry) step by step.

it is sqrt(2x-x^2), but i dont know the syntax of the tag so I cant writeis as it should be... sorry again :\

I tried but I failed Some website solve it but they dont give me the step by step solution... anyone can (at least) tell me what method I should use?

Thank you

EDIT:

Using the correct syntax is:

I'm starting to learn the syntax