Question

Write the polynomial that represents the unknown length

the polynomial is ___​

Answer 1

`2x - 5`

Explanation:

Based on segment addition theorem, we have:

`(4x - 9) - (2x - 4)`

Apply distributive property to open the parentheses

`4x - 9 -1*2x -1*-4`

`4x - 9 - 2x + 4`

Add like terms

`2x - 5`