Seudónimo Seudónimo
  • 14-07-2021
  • Mathematics
contestada

help me plz i will give you brainlist plzzzzz i beg you​

help me plz i will give you brainlist plzzzzz i beg you class=

Respuesta :

msm555
msm555 msm555
  • 15-07-2021

Answer:

Solution given:

[tex]\bold{4*3^{x+1}-9^{x}=27}[/tex]

let 3^xbe a

4*a*3-a²=27

a²-12a+27=0

a²-9a-3a+27=0

a(a-9)-3(a-9)=0

(a-9)(a-3)=0

either

a=9

3^x=3²

:.x=2

or

a=3

3^x=3^1

x=1

x=2,1

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