HelloKitty17
  • HelloKitty17
MEDAL Factor completely -9a2 + 18a – 27.
Mathematics
schrodinger
  • schrodinger
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HelloKitty17
  • HelloKitty17
Use factor by grouping
hybrik
  • hybrik
You can also factor normally : -9(a^2-2a+3)
HelloKitty17
  • HelloKitty17
a.-1(9a2 - 18a + 27) b. -9a(a2 - 2a + 3) c.-9(a2 + 2a - 3) d. -9(a2 - 2a + 3)

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hybrik
  • hybrik
D
mathstudent55
  • mathstudent55
To factor always start by trying to factor a common factor.
hybrik
  • hybrik
@mathstudent55 I explained.
hybrik
  • hybrik
You have to find a common factor in all three, which is -9
hybrik
  • hybrik
To get the answer as I shown above [ You can also factor normally : -9(a^2-2a+3) ]
HelloKitty17
  • HelloKitty17
so it is D final answer
hybrik
  • hybrik
By normally i meant grouping, yes D

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