\(9^{x+1}-5.3^{2x}=324\)
\(\Rightarrow9^x.9-5.9^x=324\)
\(\Rightarrow9^x\left(9-5\right)=324\)
\(\Rightarrow9^x.4=324\)
\(\Rightarrow9^x=81\)
\(\Rightarrow9^x=9^2\)
vậy x=2
\(\Rightarrow x=2\)
\(9^{x+1}-5.3^{2x}=324\)
\(9^x.9-5.9^x=324\)
\(9^x.\left(9-5\right)=324\)
\(9^x.4=324\)
\(9^x=81=9^2\)
\(\Rightarrow x=2\)
9x+1−5.32x=324
⇒9x.9−5.9x=324
⇒9x(9−5)=324
⇒9x.4=324
⇒9x=81
⇒9x=92
vậy x=2
9x+1−5.32x=324
⇒9x.9−5.9x=324
⇒9x(9−5)=324
⇒9x.4=324
⇒9x=81
⇒9x=92
vậy x=2
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
9x+1−5.32x=324
⇒9x.9−5.9x=324
⇒9x(9−5)=324
⇒9x.4=324
⇒9x=81
⇒9x=92
vậy x=2
