Question

Which expression is equivalent to the area of metal sheet required to make this square-shaped traffic sign?

A square shaped traffic sign is shown with length of one side labeled as 2x minus 1.

4x2 − 1
4x2 + 1
4x2 + 4x − 1
4x2 − 4x + 1

Answer 1

D) 4x2 − 4x + 1

Explanation:

Just took the test <3

Answer 2

The area of a square is
`A = s^(2)`, where s = length of a side of the square. You know the length of the square shaped traffic sign's side is s = 2x-1. Plug that value into the equation for the area of the square and foil:

`A = s^(2) \\ A = (2x-1)^(2) \\ A = (2x-1)(2x-1)\\ A = 4x^(2) - 4x + 1`

The area of the square sign is D)
`4x^(2) - 4x + 1`