Multiply Square Roots: √(3/2) × √3 × √(9/2) Calculation

Question

Solve the following exercise:

32392= \sqrt{\frac{3}{2}}\cdot\sqrt{3}\cdot\sqrt{\frac{9}{2}}=

Video Solution

Solution Steps

00:00 Solve the following problem
00:03 The root of a fraction (A divided by B)
00:06 Equals the root of the numerator (A) divided by the root of the denominator (B)
00:09 Apply this formula to our exercise
00:21 When multiplying the root of a number (A) by root of another number (B)
00:24 The result equals the root of their product (A times B)
00:27 Apply this formula to our exercise and calculate the multiplication
00:32 Make sure to multiply numerator by numerator and denominator by denominator
00:39 Calculate the multiplications
00:48 Calculate the root of 81, and the root of 4
00:53 This is the solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Identify and combine the square roots into a single square root.
  • Simplify the expression logically inside the square root.
  • Resolve the final numerical value.

Now, let's work through each step:

Step 1: Convert the expression:

32392=32392\sqrt{\frac{3}{2}} \cdot \sqrt{3} \cdot \sqrt{\frac{9}{2}} = \sqrt{\frac{3}{2} \cdot 3 \cdot \frac{9}{2}}

This results in a single square root.

Step 2: Simplify inside the square root:

32392=33922=814\frac{3}{2} \cdot 3 \cdot \frac{9}{2} = \frac{3 \cdot 3 \cdot 9}{2 \cdot 2} = \frac{81}{4}

Step 3: Calculate the square root:

  • The square root of 814\frac{81}{4} can be found by separately taking square roots of the numerator and the denominator:
  • 814=814=92\sqrt{\frac{81}{4}} = \frac{\sqrt{81}}{\sqrt{4}} = \frac{9}{2}

Thus, combining all parts logically, we resolve the expression:

92=412\frac{9}{2} = 4\frac{1}{2}

Therefore, the solution to the problem is 412\boxed{4\frac{1}{2}}.

Answer

412 4\frac{1}{2}