Question

Simplify root13-root5 square

Answer 1

Answer:

root 8

just subtract 13 - 5 and put it under the root as the two numbers are like surds

Answer 2

Step-by-step explanation:

(√13-√5)²

Using identity: (a-b)²=a²-2ab+b²

(√13)²-2(√13)(√5)+(√5)²

13-2√65+5

13+5-2√65

=18-2√65--answer