Question

Which of the following is a rational number? √15, √9, √12, √10 *​

Answer 1

Answer:

root 9 is the rational number

Answer 2

Answer:

$\sqrt{9}$

Step-by-step explanation:

15 = 3×5

therefore, root15 = root(3×5)

which is irrational

12 = 2×2×3= 2²×3

therefore, root12 = root(2²×3) = 2 root3

which is again irrational

10 = 2×5

therefore, root10 = root(2×5)

which is also irrational

9 = 3×3 = 3²

therefore, root9 = root(3²) = root3

which is rational