Question

2*3 la x -3 la x +1 +27=0​
help

Answer 1

$\it 2\cdot3^x-3^{x+1}+27=0 \Rightarrow2\cdot3^x-3\cdot3^x+3^3=0 \Rightarrow 3^x(2-3)-3^3=0\Rightarrow\\ \\ \Rightarrow -3^x+3^3=0 \Rightarrow 3^3=3^x \Rightarrow x=3$