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State whether true or false in the following: sqrt(3)sqrt(27) = 9 - Mathematics

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Question

State whether true or false in the following:

`sqrt(3)sqrt(27) = 9`

True or False
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Solution

This statement is true.

Explanation:

Step 1: Use the property of square roots

`sqrt(3) xx sqrt(27) = sqrt(3 xx 27)`

Step 2: Simplify inside the square root

3 × 27 = 81

So, `sqrt(3) xx sqrt(27) = sqrt(81)`

Step 3: Evaluate

`sqrt(81) = 9`

Step 4: Compare both sides

  • LHS = 9
  • RHS = 9

They are equal.

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Chapter 1: Rational and Irrational Numbers - MISCELLANEOUS EXERCISE [Page 18]

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B Nirmala Shastry Mathematics [English] Class 9 ICSE
Chapter 1 Rational and Irrational Numbers
MISCELLANEOUS EXERCISE | Q 7. (v) | Page 18
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