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A rectangular picture measuring 5 in. by 9 in. is surrounded by a frame with uniform width x. Write a quadratic function in standard form to show the combined area of the picture and fram

Respuesta :

irspow
A=(5+2x)(9+2x)

A=45+10x+18x+4x^2

A=4x^2+28x+45

JeremyB
(x.x)-(5x9)= Combined area of the picture and frame. 

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