Which equation can be rewritten as x + 4=x2 assume x>0

I'm guessing that x2 is an x to the power of 2, so u can rewrite that as:

x^2 - x - 4

from there you can use completing the square, quadratic function, or factoring.

If the x2 is supposed to be 2x then it would just be as follows:

x - 4