Question

2 mu x+2 - 2 mu x =96 tim x

Answer 1

\(2^{x+2}-2^x=96\)

\(2^x.\left(2^2-1\right)=96\)

\(2^x.3=96\)

\(2^x=32\)

\(2^x=2^5\)

\(\Rightarrow x=5\)

Answer 2

\(2^{x+2}-2^x=96\)   

\(2^x\left(2^2-1\right)=96\)   

\(2^x\left(4-1\right)=96\)   

\(2^x\cdot3=96\)   

\(2^x=96:3\)   

\(2^x=32\)   

\(2^x=2^5\)   

\(x=5\)