Chapter 1: Q.63 (page 10)

Evaluate each expression
63. $- \sqrt{4}$

Short Answer

Expert verified

Expression $- \sqrt{4}$ results into $- 2$

Step by step solution

- Meaning of a

The symbol $\sqrt{}$ is used to denote square root of a number.

Thus $\sqrt{a}$ denotes square root of $' a'$

- Find a whole number whose square is 4

Since, $2^{2} = 4$

So, a whole number whose square is 4 is 2

- Simplify -4

Since, square of 2 is 4

So, square root of 4 is 2, $\sqrt{4} = 2$ $\sqrt{4} = 2$

Multiply both sides by $- 1$

$\begin{matrix} (- 1) \times \sqrt{4} = (- 1) \times 2 \\ - \sqrt{4} = - 2 \end{matrix}$

Thus, value of $- \sqrt{4}$ is $- 2$

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Evaluate each expression
63. $- \sqrt{4}$

Short Answer

Step by step solution

- Meaning of a

- Find a whole number whose square is 4

- Simplify -4

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Evaluate each expression63. -4

Short Answer

Step by step solution

- Meaning of a

- Find a whole number whose square is 4

- Simplify -4

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Mechanics Maths

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Study anywhere. Anytime. Across all devices.

Evaluate each expression
63. $- \sqrt{4}$