Question

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

Answer 1

Any ideas?

Answer 2

no i need help. i dont know where to start

Answer 3

Start with the formula for the area of a square.

Answer 4

lxwxh?

Answer 5

That is the formula for the volume of a rectangular box, all we need here is A=lxw

Answer 6

so (2x-1)^2?

Answer 7

or 2(2x-1)

Answer 8

$$(2x-1)^2$$ is the correct answer because A = l*w and l=w=2x-1...good work :)

Answer 9

so what do i do after that? would it turn into 4x^2=1? here are my choices.....
4x2 - 1

4x2 + 1

4x2 + 4x - 1

4x2 - 4x + 1

Answer 10

$$A=l*w=(2x-1)(2x-1)=(2x-1)^2$$
Use the FOIL method.

Answer 11

$$4x^2 - 1$$

$$4x^2 + 1$$

$$4x^2 + 4x - 1$$

$$4x^2 - 4x + 1$$