Question

solve: 2^x+2^-x=(65/8)

Answer 1

Write it as \[2^{-x}(2^{2x}-1)=65/8\]\[2^{-3}(2^{2(3)}+1)=65/8\]\[2^{3}(2^{2(-3)}+1)=65/8\]

Answer 2

the first should be +1 not -1

Answer 3

dont know how you figured out x is 3 but thanks!