anonymous
  • anonymous
Solve by using the perfect squares method. x2 + 8x + 16 = 0 A. –2 B. 4 C. –4 D. 2
Mathematics
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@Nnesha
anonymous
  • anonymous
isnt it -4
anonymous
  • anonymous
thats what i got

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Nnesha
  • Nnesha
how did you get -4 show your work :=)
Nnesha
  • Nnesha
solve by using the *perfect squares method* what waz your first step ? :=)
anonymous
  • anonymous
sorry opn studys acting up
anonymous
  • anonymous
See how the coefficient on x^2 is a perfect square? (it is 1, which is 1 squared). See also how the constant term is a perfect square? (it is 16, which is 4 squared). Notice also that if you take the coefficient on the middle term (8) and divide it by 2 (giving you 4) and then square it, you get the product of the 1 and the 16? (4 squared is 16) That tells us this trinomial is a perfect square. (x+4)^2 By the zero product property, we know that x+4=0, so x=-4
Nnesha
  • Nnesha
nice
anonymous
  • anonymous
is it right
Nnesha
  • Nnesha
yep
anonymous
  • anonymous
thanks
Nnesha
  • Nnesha
np

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