we should have the same base in the logs
let log4x = y
then 4^y = x
2^(2y) = x
log2 x = 2y
y = (1/2)log2 x
= log2 x^(1/2)
= log2√x
then log4x = log2 √x
log2[ (x+4)/√x] = 2
(x+4)/√x = 2^2 = 4
x+4 = 4√x
square both sides
x^2 + 8x + 16 = 16x
x^2 - 8x + 16 = 0
(x-4)^2 = 0
x-4 = 0
x = 4
solve the equation.
log2(x+4)-log4x=2
please show work
1 answer