Solve for x, given the equation Square root of x minus 5 + 7 = 11.

x = 21, solution is extraneous

x = 21, solution is not extraneous

x = 81, solution is extraneous

x = 81, solution is not extraneous

I know x = 21 but I'm not sure if it is extraneous or not.

Question

Solve for x, given the equation Square root of x minus 5 + 7 = 11.

 x = 21, solution is extraneous

 x = 21, solution is not extraneous

 x = 81, solution is extraneous

 x = 81, solution is not extraneous

I know x = 21 but I'm not sure if it is extraneous or not.

john_es · Answer

I think is not extraneousm because you can plug in into the original equation, and it is satisfied.

anonymous · Answer

Ohh okay that makes sense. Thanks! :)