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marysya [2.9K]
3 years ago
10

Let r(x)=x^2.If r(x)=4,find x

Mathematics
1 answer:
ElenaW [278]3 years ago
3 0
The answer should be D
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Answer:

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Step-by-step explanation:

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<u>Substitute the area value an set an equation:</u>

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Note. the second root ignored as negative

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