Last updated on May 26th, 2025
If a number is multiplied by the same number, the result is a square. The inverse of the square is a square root. The square root is used in the field of vehicle design, finance, etc. Here, we will discuss the square root of 15/2.
The square root is the inverse of the square of the number. 15/2 is not a perfect square. The square root of 15/2 is expressed in both radical and exponential form. In the radical form, it is expressed as, √(15/2), whereas (15/2)^(1/2) in the exponential form. √(15/2) = 1.93649, which is an irrational number because it cannot be expressed in the form of p/q, where p and q are integers and q ≠ 0.
The prime factorization method is used for perfect square numbers. However, for non-perfect square numbers, the long-division method and approximation method are used. Let us now learn the following methods:
The product of prime factors is the prime factorization of a number. For the fraction 15/2, we will find the prime factors of the numerator and the denominator separately.
Step 1: Finding the prime factors of 15 and 2 Breaking it down, we get 15 = 3 x 5 and 2 = 2. So the prime factorization of 15/2 is 3 x 5 / 2.
Step 2: Since 15/2 is not a perfect square, calculating √(15/2) using prime factorization directly is not possible, but understanding the factorization helps in other methods.
The long division method is particularly used for non-perfect square numbers. In this method, we should check the closest perfect square number for the given number. Here is how to find the square root using the long division method, step by step.
Step 1: To begin with, express 15/2 as a decimal, which is 7.5.
Step 2: Now, group the number 7.5 from right to left. For this, consider it as 7.50.
Step 3: Find n such that n^2 is less than or equal to 7. The nearest perfect square is 4 (2 x 2), so n is 2. Subtract 4 from 7 to get 3, and bring down 50 to make it 350.
Step 4: Double the divisor (2) to make it 4. Find the largest digit "d" such that 4d x d is less than or equal to 350. The result is 46 x 6 = 276.
Step 5: Subtract 276 from 350 to get 74, and bring down two zeros to make it 7400.
Step 6: Continue this process to get the square root to desired decimal places.
So the square root of √(15/2) is approximately 1.936.
The approximation method is another method for finding square roots. It is an easy method to find the square root of a given number. Now let us learn how to find the square root of 15/2 using the approximation method.
Step 1: Convert 15/2 to a decimal, which is 7.5.
Step 2: Find the closest perfect squares around 7.5. The nearest perfect squares are 4 (2^2) and 9 (3^2). √(7.5) falls between 2 and 3.
Step 3: Apply the approximation formula: (Given number - smaller perfect square) / (larger perfect square - smaller perfect square). Using the formula, (7.5 - 4) / (9 - 4) = 0.7.
Step 4: Add the initial whole number, 2 + 0.7 = 2.7. Since this is an approximation to the nearest whole number, refine it to get a more accurate result. Thus, the square root of 15/2 is approximately 1.936.
Students often make mistakes while finding the square root, such as forgetting about the negative square root or skipping necessary steps in methods like long division. Let's look at a few mistakes in detail.
Can you help Max find the area of a square box if its side length is given as √(15/2)?
The area of the square is approximately 7.5 square units.
The area of the square = side^2.
The side length is given as √(15/2).
Area of the square = side^2 = √(15/2) x √(15/2) = 15/2 = 7.5.
Therefore, the area of the square box is approximately 7.5 square units.
A square-shaped building measuring 15/2 square feet is built; if each of the sides is √(15/2), what will be the square feet of half of the building?
3.75 square feet.
We can just divide the given area by 2 as the building is square-shaped.
Dividing 15/2 by 2 = we get 15/4 = 3.75.
So half of the building measures 3.75 square feet.
Calculate √(15/2) x 5.
9.68245
The first step is to find the square root of 15/2, which is approximately 1.93649.
The second step is to multiply 1.93649 by 5.
So 1.93649 x 5 ≈ 9.68245.
What will be the square root of (15/2 + 1)?
The square root is approximately 2.121.
To find the square root, first find the sum of (15/2 + 1).
15/2 + 1 = 15/2 + 2/2 = 17/2 = 8.5.
The square root of 8.5 is approximately 2.915.
Therefore, the square root of (15/2 + 1) is approximately 2.915.
Find the perimeter of the rectangle if its length ‘l’ is √(15/2) units and the width ‘w’ is 5 units.
We find the perimeter of the rectangle as approximately 13.873 units.
Perimeter of the rectangle = 2 × (length + width).
Perimeter = 2 × (√(15/2) + 5) ≈ 2 × (1.93649 + 5) ≈ 2 × 6.93649 ≈ 13.873 units.
Jaskaran Singh Saluja is a math wizard with nearly three years of experience as a math teacher. His expertise is in algebra, so he can make algebra classes interesting by turning tricky equations into simple puzzles.
: He loves to play the quiz with kids through algebra to make kids love it.