Mathematics
Grade10
Easy

Question

Rewrite the expression square root of 81 by using product property

  1. 3
  2. 9
  3. 6
  4. 3 square root of 3

Hint:

A rational number is a number that is expressed as the ratio of two integers, where the denominator should not be equal to zero, whereas an irrational number cannot be expressed in the form of fractions. Rational numbers are terminating decimals but irrational numbers are non-terminating and non-recurring.

The correct answer is: 9


    We have to rewrite the expression √81.
    We have, √81 = √(9×9) = 9.
    Hence, the correct option is B.

    The square root of a perfect square number is always a rational number.

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