Question

please help me?
x^2-10x+25=54

(the answer is x=5(+/-)3√6 )

Answer 1

Answers are \[\large x=5+3\sqrt{6} \ \ \textrm{or} \ \ x=5-3\sqrt{6}\]
See attached image for how I got those answers.

Answer 2

Note: you can condense the answers above into \[\large x=5\pm3\sqrt{6}\]