What is the positive solution to the equation x^2 - 6x + 9 = 16?

Question

Please describe how you got your answer

Answer 1

x^2 -6x + 9 = 16 factor the left side

(x-3)^2 = 16 take square roots of both sides

x-3 = + or -4 add 3 to both sides

x =3 + 4 or 3 -4

x = 7 or -1

7 is the positive solution, x=7