exam Maths Puzzle Numerical Ability

the squareroot of x+2 - x =0

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Please help with this:

Is the following symmetric with respect to the x axis, y axis, origin, or no symmetry?

y= (1)/(x^2 + 1)

to clear up my writing, x^2 is the same as x squared.

thanks

Solve: √x+2 + 15 = 11 (Show your check.)