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  • Which of the following interval is a solution of the expression  < 9?<st

Which of the following interval is a solution of the expression x^{2} < 9?

Option: 1

[-3,3)


Option: 2

(-3,3)


Option: 3

(-3,3]


Option: 4

[-3,3]


Answers (1)

best_answer

x^{2}< 9\Rightarrow x^{2}-9< 0\Rightarrow \left ( x-3 \right )\left ( x+3 \right )< 0

x\in \left ( -3,3 \right )

Posted by

Gunjita

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