algebra

(x-10)^2=20

Give exact and approximate solutions to three decimal places.

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1. take √ of both sides ...
x-10 = ± √20
x = 10 ± √20 or 10 ± 2√5 <---- exact answer

I will let you push buttons on a calculator.

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posted by Reiny
2. Thanks!

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posted by Kat

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