Hi there!
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I believe your answer is:
± 7
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Here’s why:
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⸻⸻⸻⸻[tex]\text{\textbf{Since...}}\\\\7 * 7 = 49\\\\-7 * -7 = 49 \text{ \textbf{ REMEMBER:} Two negative numbers would have a positive product.}\\\\\text{We can conclude that...}\\\\\boxed{\sqrt{49} = \pm 7}[/tex]
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Hope this helps you. I apologize if it’s incorrect.