Question

Which is the extraneous solution of

Answer 1

–5
–3
3
5

Answer 2

x^2 = 2x + 15
= x^2 - 2x - 15
= (x - 5) . (x+3)
thus x = 5 or -3

Answer 3

Solution is x = -3 so x = 5 is the extraneous root.