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OpenStudy (anonymous):
What number completes the square? x2 + 10x + ? A. 10 B. 100 C. 20 D. 25 What number completes the square? x2 + 10x + ? A. 10 B. 100 C. 20 D. 25 @Mathematics
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hero (hero):
x^2+10x+25
hero (hero):
To find out, always split the middle term to something like 5x + 5x Then you will know that 5*5 = 25
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