Correct answer only ! i cannot retake jack wrote this solution to solve for x. which statement is true?

the correct answer should be (b) 6 is extraneous.

If you look at the second row of the solution you see (x-6) as a factor in one of the denominators. That's a problem: if 6 were a solution this denominator would become 0. But denominators being 0 is bad (undefined), so while 6 comes out of the algebraic manipulation as a solution, it is invalid, or extraneous.

-3 is a fine solution.

the correct answer should be (b) 6 is extraneous

goog may have it for you

x = 3 ± √(5+y)