Question

tim x:\(2^{x+2}-2^x\)=96

Answer 1

      2^{x + 2} - 2^x - 96
=>  2^x . 2² - 2^x . 1 = 96

=> 2^x (2² - 1) = 96

=> 2^x . 3= 96

=> 2^x = 96 : 3  =32

=> x = 5

Answer 2

2^{x + 2} - 2^x  = 96
=>  2^x . 2² - 2^x . 1 = 96

=> 2^x (2² - 1) = 96

=> 2^x . 3= 96

=> 2^x = 96 : 3  =32

=> x=5.