Question

Simplify: √81 + √36 + √4

Answer 1

To simplify : $\sqrt{81 } + \sqrt{36} + \sqrt{4}$

Solution:

• square root of a number is a number which gets multiplied to itself to given the  original number.

• To simplify we need to find square roots of the given numbers in the expression.
• finding a square root of numbers is inverse of squaring a numbers.

Let, a be any number then , $a \times a = a^{2}$ taking square root we get

                                                $\sqrt{a^{2} } = a$

Similarly we can find $\sqrt{81} = \sqrt{9\times9} = 9$

                                   $\sqrt{36} = \sqrt{6\times6}= 6$

                                   $\sqrt{4} = \sqrt{2\times2} = 2$

now , substituting these value in the given expression we get,

$\sqrt{81 } + \sqrt{36} + \sqrt{4}$ $= 9 + 6 +2$

                          $= 17$

hence 17 is the required answer.

Answer 2

Answer:

$17$

Step-by-step explanation:

• Given expression: $\sqrt{81}+\sqrt{36} +\sqrt{4}$

• To solve the above expression, we need to find the square roots of $81,36$ and $4$

• As we know, the square root of a number is the number which is multiplied by itself to get the square number.

• $81$ can be written as $9\times9$, so, the square root of $81$ is $9$.

• $36$ can be written as $6\times6$ so, the square root of $36$ is $6$

• $4$ can be written as $2\times2$ so, the square root of $4$ is $2$

• On substituting the above values in the given expression, we get

$\sqrt{81}+\sqrt{36} +\sqrt{4}$

$=9+6+2$

$=17$

Hence, the answer is $17$.