Question

2^x+3 +   2^x=144

Answer 1

2^x+3 + 2^x  = 144

=> 2^x. 8  = 144 - 2^x ( vì 2^x.8 = 2^x.2³)

=> 2^x. 8 + 2^x = 144 + 2^x - 2^x

=> 2^x . 9 = 144

=> 2^x = 144 : 9 = 16

=> 2^x = 2⁴

=> x = 4

Tíc mình nha!

Answer 2

2^(X+3)+2^X=9.2^x=144=9.2^4=> x=4

thử lại

2^7+2^4

128+16=144

Answer 3

2^{x + 3} + 2^x = 144

9 . 2 ^x  = 144

9 . 2 ⁴ = 144

vậy x = 4