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

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

Mathematics
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1 Attachment
(2x-1)^2
A) 4x^2-1 B)4x^2+1 C)4x^2+4x-1 D)4x^2-4x+1

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Other answers:

So the answer would be 4x+1?
|dw:1437606825983:dw|
so D
So i multiply (2x-1)(2x-1) = 4x^2-4x+1?
Thanks can you help me on 2 others?
YEP that's right good job
Yes i can
Alright ill post them here
Consider the functions f(x) = 2x + 1 and g(x) = x2 − 10. What is the value of f[g(3)]?
A)39 B) -3 C) -7 D)-1
so x=3
I dont understand
Okay
g(x)=3^2-10
g(x)=9-10
g(x) = x^2 - 10 g(3) = 3^2 -10 = ?
g(x)=-1
yea g(x)=-1
substitute that for the x's in f(x)
right now plug in x = -1 into f(x)
-2+1 = -1
Yep!
right d
So is the answer -1?
yeah
Thanks guys :D
One more
Given f(x) = 3x − 10 and g(x) = 12x + 8, solve for (f + g)(x) and select the correct answer below.
(f + g)(x) = 15x − 2 (f + g)(x) = 9x − 2 (f + g)(x) = 15x + 2 (f + g)(x) = 36x2 − 120x
k hang on
3x -10 + 12x = 8
now simplify
ok so its pretty much f(x)+g(x)
* thats + 8 not = 8
okay so i get 15x-10=8
15x=-2
so (f+g)(x)=15x-2
x=-7.5?
no the answer is (f+g)(x)=15x-2
Oh okay thank you, how did you get to that?
I added f(x)+g(x)
I see
3x -10 + 12x + 8 = 15x - 2
so 3x-10+12x+8
that equals 15x-2
ohhhhhh okay thanks guys <3
no problem.
both @welshfella and @snivvles.com

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