Question

2^3.x+2=4^x+5

Answer 1

2^3.x+2=4^x+5

2^3x+2=2^2x+10

=> 3x + 2 = 2x + 10

3x - 2x = 10 - 2

x = 8

Vậy x = 8.

Answer 2

\(2^{3.x+2}=4^{x+5}\)

\(\Rightarrow2^{3.x+2}=\left(2^2\right)^{x+5}\)

\(\Rightarrow2^{3.x+2}=2^{2x+10}\)

\(\Rightarrow3.x+2=2x+10\)

\(\Rightarrow3.x-2x=10-2\)

\(\Rightarrow x=8\)

Answer 3

\(2^{3x+2}=4^{x+5}\)\(=>\)\(2^{3x+2}=\left(2^2\right)^{x+5}\)\(=>\)\(2^{3x+2}=2^{2x+10}\)\(=>\)\(3x+2=2x+10\)\(=>\)\(x=8\)

Answer 4

\(2^{3x+2}=4^{x+5}\)

=>\(2^{3x+2}=\left(2^2\right)^{x+5}\)

=>\(2^{3x+2}=2^{2x+10}\)

=>3x+2=2x+10

=>3x-2x=10-2 (quy tắc chuyển vế)

=>x=8

Chúc bạn học tốt ^.^ 

Answer 5

2^3.x+2 = 4^x+5

2^3.x+2 = 2^2.(x+5)

2^3.x+2 = 2^2.x+10

=> 3.x + 2 = 2.x + 10

=> 3.x - 2.x = 10 - 2

=> x = 8

Vậy x = 8

Ủng hộ mk nha ^_-

Answer 6

Ta có:      2^3.x+2=4^x+5

              ^=> 2^3.x+2=(2²)^x+5

          =>2^3.x+2= 2^2.x+5

          =>3.x+2=2.x+5

          =>x+ 2= 10    (bớt cả 2 vế đi 2.x)

          =>x     =10-2

          =>x      =8

          Vậy x=8