The square root of 54 is a number that, when multiplied by itself, equals 54. It can be written as √54. Simplifying √54 means finding a simpler expression that is equivalent to it. One way to simplify √54 is to factor 54 into its prime factors. 54 can be factored as 2 × 3 × 3 × 3. The square root of 54 is then equal to the square root of 2 × 3 × 3 × 3, which can be simplified further to √2 × √3 × √3 × √3.
Since the square root of 2 is an irrational number, it cannot be simplified further. However, the square root of 3 can be simplified to a rational number. The square root of 3 is approximately equal to 1.732. Therefore, the square root of 54 can be simplified to approximately 1.732 × 1.732 × 1.732, which is approximately equal to 5.196.
Another way to simplify √54 is to use the Pythagorean theorem. The Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides. In this case, we can let the hypotenuse be √54 and the other two sides be √2 and √27. Using the Pythagorean theorem, we can find that √54 = √(2^2 + 27^2) = √(4 + 729) = √733.
Applying the Pythagorean Theorem
The Pythagorean Theorem states that in a right triangle, the square of the hypotenuse (the longest side) is equal to the sum of the squares of the other two sides. In other words:
a² + b² = c², where a and b are the lengths of the legs of the triangle and c is the length of the hypotenuse.
We can use the Pythagorean Theorem to simplify square roots of numbers that are perfect squares. For example, to simplify the square root of 54, we can first find two numbers whose squares add up to 54. One such pair of numbers is 6 and 3, since 6² + 3² = 36 + 9 = 54. Therefore, we can rewrite the square root of 54 as:
√54 = √(6² + 3²) = √6² + √3² = 6 + 3 = 9
Therefore, the square root of 54 is 9.
Simplifying Square Roots of Numbers That Are Perfect Squares
To simplify the square root of a number that is a perfect square, follow these steps:
- Find two numbers whose squares add up to the given number.
- Rewrite the square root of the given number as the square root of the sum of the squares of the two numbers.
- Simplify the square root of each number.
- Add the simplified square roots to get the simplified square root of the given number.
Example
Simplify the square root of 100.
Step 1: Find two numbers whose squares add up to 100. One such pair of numbers is 10 and 0, since 10² + 0² = 100 + 0 = 100. Step 2: Rewrite the square root of 100 as the square root of the sum of the squares of the two numbers. √100 = √(10² + 0²) Step 3: Simplify the square root of each number. √10² = 10 and √0² = 0 Step 4: Add the simplified square roots to get the simplified square root of the given number. 10 + 0 = 10 Therefore, the square root of 100 is 10.
| Given Number | Two Numbers Whose Squares Add Up to the Given Number | Simplified Square Root |
|---|---|---|
| 54 | 6 and 3 | 9 |
| 100 | 10 and 0 | 10 |
| 144 | 12 and 0 | 12 |
| 225 | 15 and 0 | 15 |
| 324 | 18 and 0 | 18 |
Alternative Methods for Simplifying Sqr54
In addition to the factorization method, there are several alternative approaches to simplifying Sqr54:
1. Prime Factorization
Express Sqr54 as a product of its prime factors, Sqr54 = Sqr(2 x 33) = Sqr(2) x Sqr(33) = Sqr(2) x 3Sqr3 = 3Sqr2 x Sqr3. Therefore, Sqr54 = 3Sqr6.
2. Estimation
Find two consecutive integers that Sqr54 falls between. Since 72 = 49 and 82 = 64, Sqr54 lies between 7 and 8. Hence, Sqr54 can be approximated as 7 + (0.5), which is approximately 7.5.
3. Graphing Calculator
Use a graphing calculator to evaluate Sqr54. Input “sqrt(54)” into the calculator to obtain the decimal approximation of 7.34846922834.
4. Long Division
Perform long division to express Sqr54 as a decimal. Divide 54 repeatedly by the divisors 1, 2, 3, 4, and so on, grouping digits into pairs. Continue the process until the divisor exceeds the square root of the remaining quotient.
5. Repeated Squaring
Repeatedly square the number until it becomes close to the desired square root. Start with an initial value, such as 7, and repeatedly square it until it exceeds Sqr54. The last squared value before exceeding Sqr54 will be the closest integer approximation.
6. Newton-Raphson Method
Use the Newton-Raphson iterative method to approximate Sqr54. Start with an initial guess, such as 7, and repeatedly refine the estimate using the formula:
| Iteration | Estimate |
|---|---|
| 1 | 7 |
| 2 | 7.333 |
| 3 | 7.348 |
| 4 | 7.3485 |
Continue the iterations until the desired accuracy is achieved.
How to Simplify √54
Square root of 54 can be simplified by finding the factors of 54 that are perfect squares. 54 can be written as 6 * 9, and both 6 and 9 are perfect squares. Therefore, √54 can be simplified as √(6 * 9) and can be further simplified as √6 * √9. The square root of 6 is √6 and the square root of 9 is 3. Therefore, √6 * √9 can be further simplified to √6 * 3. This is the simplified form of √54.
People also ask about How to Simplify √54
How to find factors of a number?
To find factors of a number, you need to find numbers that divide the original number evenly and without any remainder. For example, the factors of 12 are 1, 2, 3, 4, 6, and 12 because each of these numbers divides 12 evenly.
Can I use a calculator to simplify square roots?
Yes
Most calculators have a square root function that can be used to simplify square roots. To use the square root function, simply enter the number you want to find the square root of and press the square root button.