sqrt(10a) + 5 sq. rt. (250a^2) add and sinplify

sqrt(10a) + 5*sqrt(250a^2) =

sqrt(10a) + 5*sqrt(25*10a^2) =
sqrt(10a) + s*5a*sqrt(10) =
sqrt(10a + 25a*sqrt(10) =
sqrt10(sqrfa+25a).