anonymous
  • anonymous
Help Medal and Fan If (9x − 4)(9x + 4) = ax2 − b, what is the value of a? The value of a is _____________.
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
anonymous
  • anonymous
81x^2 + 36x-36x-16
anonymous
  • anonymous
81x^2-16

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anonymous
  • anonymous
so it cancels out
anonymous
  • anonymous
wouldnt it be 81? since 81 is the term for a
anonymous
  • anonymous
i mean 81
anonymous
  • anonymous
lol thanks again
anonymous
  • anonymous
lol thanks again
triciaal
  • triciaal
already done difference of 2 squares yes a = 81

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