Question

What is the value of x ???

Answer 1

D.
`2\sqrt {133}`

Explanation:

`{x}^(2) = {18}^(2) + ( {12}^(2) + {8}^(2) ) \\ \\ {x}^(2) = 324 + (144 + 64) \\ \\ {x}^(2) = 324 + 204 \\ \\ {x}^(2) = 528 \\ \\ x = √(532) \\ \\ x = √(4* 133) \\ \\ x = 2\sqrt {133}`