Solution of radical expression and surds | Exercise No 1.2 Q No 2 | Mathematics new book 9th class

Only radicals with the same index and radicand are “like terms” and can be combined. Examples √3 + 2√3 = 3√3 5 √(2a) – √(2a) = 4√(2a) Multiplication Rule √a × √b = √(ab)  (works only if indices match and both radicals are non-negative in the reals). Example: √6 × 2√10 = 2√60 = 2√(4 × 15) = 2 × 2√15 = 4√15 Rationalising the Denominator Dividing by radicals is usually rewritten with a rational denominator. Single simple root: multiply top and bottom by that root. #mathematics #mathsclass9chapter2 ​ ​ ​