State whether true or false:
Square root of $121$ is $11$ and $(- 11)$ .

True

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False

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Solution

The correct option is A True
It can either be $11^{2}$ or $(- 11)^{2}$
$11 \times 11 = 121$
$- 11 \times - 11 = 121$
The given statement is true.

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Question 73

State whether the following statement is true or false:

Square root of a number x is denoted by $\sqrt{x}$ .

\sqrt{1 + i}

2^{1 / 4} (cos \frac{π}{8} + i sin \frac{π}{8})

x^{2} = 11

x = \sqrt{11}

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