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Mathematics 21 Online
OpenStudy (anonymous):

PLease help look at link

OpenStudy (anonymous):

OpenStudy (anonymous):

Can you set up an equation for the are of the frame in terms of x?

OpenStudy (anonymous):

Any thoughts, Pie boi?

OpenStudy (anonymous):

I dont know

OpenStudy (anonymous):

Refer to picture.

OpenStudy (anonymous):

Always good to start by drawing a picture. So that is the picture and the frame. How can we figure out how much area the frame has?

OpenStudy (anonymous):

would it be (x2-3*x2-3)-(x*x)=27

OpenStudy (anonymous):

Yes =) But be careful with parenthesis. It's (x^2-3)(x^2-3). That's different from (x^2-3*x^2-3)

OpenStudy (anonymous):

So now just simplify and solve the equation for x.

OpenStudy (anonymous):

x=3,-3

OpenStudy (anonymous):

Yes. x=3, so what are the dimensions of the frame?

OpenStudy (anonymous):

You sure? Is x the side-length of the frame or of the picture?

OpenStudy (anonymous):

picture so the picture is 3x3

OpenStudy (anonymous):

so the frame is 6x6

OpenStudy (anonymous):

Yessir. =) Good job.

OpenStudy (anonymous):

thanks

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