Question

Given that
x:8=2:x
Calculate the positive value of x.

Answer 1

4.

Explanation:

x/8 = 2/x

Cross multiply:

x^2 = 16

x = 4.

Answer 2

`x = 4`

Explanation:

`x : 8 = 2 : x \\ (x)/(8) = (2)/(x) \\ \\ cross \: \: multiple \\ {x}^(2) = 16 \\ x = √(16) \\ x = 4`