2x+2 - 2x = 96
2x . 22 - 2x . 1 = 96
2x . ( 22 - 1 ) = 96
2x . 3 = 96
2x = 32
2x = 25
=> x = 5
hok tốt
\(2^{x+2}-2^x=96\)
\(\Rightarrow2^x.\left(2^2-1\right)=96\)
\(\Rightarrow2^x.3=96\)
\(\Rightarrow2^x=96:3=32=2^5\)
\(\Rightarrow x=5\)
\(2^{x+2}-2^x=96\)
\(2^x.4-2^x=96\)
\(3.2^x=96\) =>\(2^x=32\) =>x=5
\(2^{x+2}-2^x\Leftrightarrow2^x.2^2-2^x=96\)
\(2^x.\left(2^2-1\right)=96\)
\(2^x.3=96\)
\(2^x=96:3\)
\(2^x=32\)
\(2^x=2^5\)
\(\Rightarrow x=5\)
2x+2-2x=96
2x.22-2x.21=96
=> 2x.(22-1)=96
2x.3=96
2x=96:3
2x=32
32=25
=> x=5
Vay x=5