Question

\(9^{x+1}-5.3^{2x}=324\)

Answer 1

\(9^{x+1}-5.3^{2x}=324\)

\(\Rightarrow9^x.9-5.9^x=324\)

\(\Rightarrow9^x\left(9-5\right)=324\)

\(\Rightarrow9^x.4=324\)

\(\Rightarrow9^x=81\)

\(\Rightarrow9^x=9^2\)

vậy x=2

\(\Rightarrow x=2\)

Answer 2

\(9^{x+1}-5.3^{2x}=324\)

\(9^x.9-5.9^x=324\)

\(9^x.\left(9-5\right)=324\)

\(9^x.4=324\)

\(9^x=81=9^2\)

\(\Rightarrow x=2\)

Answer 3

x=2 bạn nhe!

Answer 4

9x+1−5.32x=324

⇒9x.9−5.9x=324

⇒9x(9−5)=324

⇒9x.4=324

⇒9x=81

⇒9x=92

vậy x=2

Answer 5

9x+1−5.32x=324

⇒9x.9−5.9x=324

⇒9x(9−5)=324

⇒9x.4=324

⇒9x=81

⇒9x=92

vậy x=2

Answer 6

9^x+1 - 5.3^2x = 324

=> 9^x . 9 - 5.9^x = 324 

=> 9^x . ( 9 - 5 ) = 324 

=> 9^x . 4 = 324

=> 9^x = 324 : 4 = 81

=> 9^x = 9^2 

=> x = 2

Answer 7

   

9x+1−5.32x=324

⇒9x.9−5.9x=324

⇒9x(9−5)=324

⇒9x.4=324

⇒9x=81

⇒9x=92

vậy x=2