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your equation is this...

0 = x2 - 2

solve for x and you get the square root of 2..

your answer is the square root of 2...

sqrt(2) = 1.414213562

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Actually it is 47. 49 is the perfect square of 7 and two less than that is 47 with 4 being in the tens place.

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Q: What number has a 4 in the tens place that is 2 less than a perfect square?
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