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OpenStudy (anonymous):
What number must you add to complete the square? x2 + 8x = 9
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OpenStudy (anonymous):
Answer choices: A. 4 B. 8 C. 32 D. 16
OpenStudy (anonymous):
@chycora @hugsnotughs
OpenStudy (er.mohd.amir):
x2+8x=9 x2+2*x*4+16=9+16 (x+4)^2=25 so add 16. option D.
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