Square root of 21 minus square root of 8 (√21-√8)

√21 - √8

Here we will walk you through the process of calculating the difference between the square root of 21 and the square root of 8. Essentially, we will calculate √21 - √8.

First, we need to find the square root of each number individually. Then we will subtract one from the other. Below is the step-by-step calculation:

1. Calculate the square root of 21:
√21 ≈ 4.58258

2. Calculate the square root of 8:
√8 ≈ 2.82843

3. Subtract the square root of 8 from the square root of 21:
4.58258 - 2.82843 = 1.75415

Therefore, the result of subtracting the square root of 8 from the square root of 21 is approximately 1.75415.

√21 - √8 ≈ 1.75415

To make things even more convenient, we have also expressed the result in its simplest radical form:

√21 - 2√2

Subtracting Square Roots
Use the tool below to subtract another set of square roots.

Square root of 21 minus square root of 9
Here is another square root problem that you may find interesting.