Need asap ! combine the following expressions. 1) √48n^3 + √9n - √3n a) (4n - 1)√3n - 3√n b) (4n - 1)√3n + 3√n c) 3n√3n + 3√n 2) r√t + s√t a) √rs + 2t b) (r-s)√t c) (r+s)√t