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

Square Root Multiplication with Mixed Numbers

Solve the following exercise:

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

❤️ Continue Your Math Journey!

We have hundreds of course questions with personalized recommendations + Account 100% premium

Step-by-step video solution

Watch the teacher solve the problem with clear explanations
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 written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve the following exercise:

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

2

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}}.

3

Final Answer

412 4\frac{1}{2}

Key Points to Remember

Essential concepts to master this topic
  • Rule: Multiply square roots by combining under one radical
  • Technique: ab=ab \sqrt{a} \cdot \sqrt{b} = \sqrt{a \cdot b} gives 814 \sqrt{\frac{81}{4}}
  • Check: Verify 92=412 \frac{9}{2} = 4\frac{1}{2} by converting back to improper fraction ✓

Common Mistakes

Avoid these frequent errors
  • Multiplying square roots incorrectly
    Don't add the expressions inside the radicals = 32+3+92 \sqrt{\frac{3}{2} + 3 + \frac{9}{2}} ! This gives a completely wrong result. Always multiply the expressions inside: 32392 \sqrt{\frac{3}{2} \cdot 3 \cdot \frac{9}{2}} .

Practice Quiz

Test your knowledge with interactive questions

Choose the largest value

FAQ

Everything you need to know about this question

Can I multiply square roots together like regular numbers?

+

Yes! The key rule is ab=ab \sqrt{a} \cdot \sqrt{b} = \sqrt{a \cdot b} . You combine all the expressions under one square root, then simplify what's inside.

How do I multiply fractions inside square roots?

+

Multiply fractions normally: 32392=33922=814 \frac{3}{2} \cdot 3 \cdot \frac{9}{2} = \frac{3 \cdot 3 \cdot 9}{2 \cdot 2} = \frac{81}{4} . Remember to multiply numerators together and denominators together.

Why does the answer become a mixed number?

+

When 814=92 \sqrt{\frac{81}{4}} = \frac{9}{2} , we get an improper fraction. Converting 92 \frac{9}{2} gives us 412 4\frac{1}{2} because 9 ÷ 2 = 4 remainder 1.

How do I take the square root of a fraction?

+

Use the rule ab=ab \sqrt{\frac{a}{b}} = \frac{\sqrt{a}}{\sqrt{b}} . So 814=814=92 \sqrt{\frac{81}{4}} = \frac{\sqrt{81}}{\sqrt{4}} = \frac{9}{2} .

What if I can't simplify the square root perfectly?

+

In this problem, both 81 and 4 are perfect squares (9² and 2²), so we get exact answers. If they weren't perfect squares, you'd leave the answer in radical form.

🌟 Unlock Your Math Potential

Get unlimited access to all 18 Rules of Roots questions, detailed video solutions, and personalized progress tracking.

📹

Unlimited Video Solutions

Step-by-step explanations for every problem

📊

Progress Analytics

Track your mastery across all topics

🚫

Ad-Free Learning

Focus on math without distractions

No credit card required • Cancel anytime

More Questions

Click on any question to see the complete solution with step-by-step explanations