Evalute the radical expressions

 

step1: simplify 

step 2: use the exponent rules (power of fraction rule)

step 3: divide 98 by 2 which gives 49 

step 4: square root of 49 is 7 

(explanation: 49^1/2 is nothing but the square root of 49, I assume as what number gives you 49 or some number when it's multiplied two times