Question

2^(x+3)+5.2^(x+2)=224

 

Answer 1

2^x+3 + 5.2^x+2 = 224

2^x.2³ + 5.2^x.2² = 224

2^x.(8 + 5.4) = 224

=> 2^x . 28 = 224

=> 2^x = 8 = 2³

=> x = 3

Answer 2

         2^x+3  + 5.2^x+2  =224

<=> 2^x+2 . 2 + 5 . 2^x+2 = 224

<=> 2 ^x+2 . (2+5) = 224

<=> 2^x+2 . 7  = 224

<=> 2 ^x+2  = 32

<=> 2^x+2  = 2 ⁵ 

^{<=> x + 2 = 5}

^{<=> x= 5 - 2}

^{<=> x = 3}

^{Vậy :X =3}