The number of integral values of x if the following statement is valid?
$0 \leq x^{2} \leq 100$

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Solution

The correct option is D 21
for $x^{2}$ to be in

$0 \leq x^{2} \leq 100$

Taking roots on both sides we get

$x \in R a n d x \in [- 10, 10]$

So $x$ is in the range

$- 10 \leq x \leq 10$

So, we have $21$ solutions for $x$ in this range including $0$

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