Which value is an irrational number?

Question

(1 point)
Responses

3–√⋅12−−√
square root of 3 times square root of 12

2√⋅8√5
the fraction with numerator square root of 2 times square root of 8 and denominator 5

10+13−−√
10 plus square root of 13

7–√−7–√

Answer 1

7 - √7