Question

Someone please help me with this problem

Answer 1

x =
`√(73)`

Explanation:

Using Pythagoras' identity in the right triangle

x² + 7² = (
`√(122)` )²

x² + 49 = 122 ( subtract 49 from both sides )

x² = 73 ( take the square root of both sides )

x =
`√(73)`