Hey guys please help with this question

2 square root of 13 i think

Step-by-step explanation:

im not sure if i remember clearly but i think we have to use:

a^2 + b^2 = c^2

sooo

(4)^2 + (6)^2 = c^2

16 + 36 = c^2

52 = c^2

then since theres no exact number for sq rt of 52 we think if it can be divided by other numbers like 4 16 etc.

since it can get 4 out, its not 4 sq rt of 13 its 2 sq rt of 13 because you have to square the 4 to take it out

2 square root of 13 i think

2 sq rt 13 so the second choice

Step-by-step explanation:

use quadratic formula

a^2 + b^2 = c^2

4^2 + 6^2 = c^2

16 + 36 = c^2

52 = c^2

sq rt of 52

2 sq rt 13