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OpenStudy (anonymous):
What number should be added to this expression to make it a perfect square? x2 + 10x
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OpenStudy (anonymous):
+25
OpenStudy (anonymous):
add 25 and it will be a perfect square.
OpenStudy (precal):
take the middle number 10 and divide it by 2 which is 5 then take the 2nd power of it and it is 25
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