Question

If 2^x+2 + 2^x-1 = 9 , find the value of x

Answer 1

Answer:

X = 2

Step-by-step explanation:

2^x + 2 + 2^x -1 = 9

2^x + 2^x +2-1 = 9

4^x + 1 = 9

4^x = 9-1

4^x = 8

square root of x = 8÷2

square root of x = 4

therefore, x = square root of 4

therefore, x = 2