giai giup em cau 2 luy thua x +2luy thua x+3 =144
giai giup em cau 2 luy thua x +2luy thua x+3 =144
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giai giup em cau 2 luy thua x +2luy thua x+3 =144
Delwyn
$2^x+2^{x+3}=144$
$\Leftrightarrow 2^x+2^x.2^3=144$
$\Leftrightarrow 2^x(1+2^3)=144$
$\Leftrightarrow 9.2^x=144$
$\Leftrightarrow 2^x=16$
$\Leftrightarrow 2^x=2^4$
$\Leftrightarrow x=4$