Question

solve
(x-20)^2=20

Answer 1

hint.. square root both sides

Answer 2

\[\LARGE \sqrt{(x-20)^2}=\sqrt{20} \quad \quad \Longrightarrow x-20=2\sqrt5\]
\[\LARGE x=20+2\sqrt5\]

Answer 3

x^2-40x+400-20=0
x^2-40x+380=0

Answer 4

actually there are two solutions... \[\LARGE \pm\]

Answer 5

\[\LARGE x=20\pm 2\sqrt5\]