Question 102876
If you factor the left side you get:
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{{{(x + 2)^2 = 7}}}
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Then if you take the square root of both sides you get:
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{{{x + 2 = sqrt(7)}}}
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Note the right side has a plus and minus sign. If you now subtract 2 from both sides
to get rid of the 2 on the left side you get:
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{{{x = -2 +- sqrt(7)}}}
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Hope this helps you to find the source of your difficulty.
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