anonymous
  • anonymous
What number would you have to add to both sides to complete the square? x2 – 16x = –8 A. –64 B. –16 C. 16 D. 64
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
either A or D not sure
anonymous
  • anonymous
campbell_st
  • campbell_st
ok... so what is half of -16..? then square that value... that is what is added to both sides to complete the square remember \[(a - b)^2 = a^2 - 2ab + b^2\]

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anonymous
  • anonymous
campbell_st
  • campbell_st
well its not A
anonymous
  • anonymous
so then D
campbell_st
  • campbell_st
well is \[x^2 - 16x + 64\] a perfect square... if you say yes, then you have your answer
anonymous
  • anonymous
yes

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