giai giup em cau 2 luy thua x +2luy thua x+3 =144

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1. $2^x+2^{x+3}=144$

   $\Leftrightarrow 2^x+2^x.2^3=144$

   $\Leftrightarrow 2^x(1+2^3)=144$

   $\Leftrightarrow 9.2^x=144$

   $\Leftrightarrow 2^x=16$

   $\Leftrightarrow 2^x=2^4$

   $\Leftrightarrow x=4$

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