Question

Find the value of x. correct answer please

Answer 1

`x = √(30)`

Explanation:

By Geometric mean property:

`BD = √(3 * 7) \\ BD = √(21) \\ by \: pythagoras \: theorem \\ {x}^(2) = { (√(21)) }^(2) + {(3)}^(2) \\ {x}^(2) = 21 + 9 \\ {x}^(2) = 30 \\ x = √(30)`