anonymous
  • anonymous
1
Mathematics
katieb
  • katieb
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RadEn
  • RadEn
can you check the discriminant ?
RadEn
  • RadEn
discriminant (D) = b^2 - 4ac
anonymous
  • anonymous
it is 0

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zzr0ck3r
  • zzr0ck3r
(-b+-sqrt(b^2-4ac))/2a is how we find roots you just showed that the sqrt part is 0 so you are left with -b/(2a)
zzr0ck3r
  • zzr0ck3r
this is only one solution
RadEn
  • RadEn
if D = 0 then it has the same roots
zzr0ck3r
  • zzr0ck3r
note: if you did not get 0, then the sqrt part would have two answers because we do +-sqrt.
anonymous
  • anonymous
so my answer is d) ?

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