QuestionAugust 26, 2025

Which square root is irrational? sqrt (64) sqrt (18) sqrt (81) sqrt (121)

Which square root is irrational? sqrt (64) sqrt (18) sqrt (81) sqrt (121)
Which square root is irrational?
sqrt (64)
sqrt (18)
sqrt (81)
sqrt (121)

Solution
3.8(238 votes)

Answer

\sqrt{18} is irrational. Explanation 1. Identify Perfect Squares Check if each number is a perfect square. \sqrt{64} = 8, \sqrt{81} = 9, and \sqrt{121} = 11 are integers. 2. Determine Irrationality \sqrt{18} is not a perfect square, as it cannot be expressed as an integer.

Explanation

1. Identify Perfect Squares<br /> Check if each number is a perfect square. $\sqrt{64} = 8$, $\sqrt{81} = 9$, and $\sqrt{121} = 11$ are integers.<br />2. Determine Irrationality<br /> $\sqrt{18}$ is not a perfect square, as it cannot be expressed as an integer.
Click to rate: