\(2^x+2^{x+3}=144\)

\(\Rightarrow2^x\left(1+2^3\right)=144\)

\(\Rightarrow2^x.9=144\Rightarrow2^x=16\Rightarrow x=4\)

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2^x + 2^x-3 = 144

\(2^xx1+2^xx2^3\)\(=144\) 

\(2^x.\left(1+2^3\right)=144\) 

\(2^x.9=144\)

\(2^x=144:9\) 

\(2^x=16\)

\(2^x=2^4\)

\(=>x=4\) 

2^x+2^x+3=144

=>2^x+2^x.2³=144

=>2^x+2^x.8=144

=>2^x.(8+1)=144

=>2^x.9

=>2^x=144:9

=>2^x=16=2⁴

=>x=4

2^x+2^x+3=144

2^x . 1 + 2^x . 2³ = 144

2^x . ( 1 + 2³ ) = 144

2^x . 9 = 144

2^x = 144 : 9

2^x = 16

2^x = 2⁴

=> x = 4

2^x+3+2^x=144

=> 2^x.(2³+1)=144

=> 2^x.(8+1)=144

=> 2^x.9=144

=> 2^x =144:9

=> 2^x =16

=> 2^x=2⁴

=> x=4

Học vui!^^

Ta có:\(2^{x+3}+2^x=144\)

\(\Rightarrow2^x\left(2^3+1\right)=144\)

\(\Rightarrow2^x.9=144\)

\(\Rightarrow2^x=16\Rightarrow2^x=2^4\)

\(\Rightarrow x=4\)

1: =>-4x=14

=>x=-7/2

2: =>(x-5)(x+2)=0

=>x=5 hoặc x=-2

3: =>2^x*9=144

=>2^x=16

=>x=4

2^x+2³.2^x=144
(2^x.1)+(2^x.2³)=144
2^x.(1+2³)=144
2^x.   9    =144
       2^x    =144:9
       2^x   =16
       2^x   =2⁴
\(\Rightarrow\)x   =4   
       

x=4 

k mk nha

mk k bn rùi đó !

\(2^x+2^{x+3}=144\)

\(\Leftrightarrow2^x\left(1+2^3\right)=144\)

\(\Leftrightarrow2^x=16\)

\(\Leftrightarrow x=4\)

\(2^x+2^{x+3}=144\)

\(\Rightarrow2^x+2^x.2^3=144\)

\(\Rightarrow2^x.\left(1+2^3\right)=144\)

\(\Rightarrow2^x.9=144\)

\(\Rightarrow2^x=16\)

\(\Rightarrow2^x=2^4\)

\(\Rightarrow x=4\)

Vậy \(x=4\)

\(2^x+2^{x+3}=144\)

=> \(2^x.\left(1+2^3\right)=144\)

=> \(2^x.\left(1+8\right)=144\)

=> \(2^x.9=144\)

=> \(2^x=144:9\)

=> \(2^x=16\)

=> \(2^x=2^4\)

=> \(x=4\)

Ta co : 

2^x+2^x+3=144

2^x.1+2^x.2^3=144

2^x(1+2^3)=144

2^x.9=144

2^x=144:9

2^x=16

Ma :2^x=2^4

=>x=4

****