michelle95
refer to the diagram. a machin will cut a small square of plastic from a larger square. write an expression for the remaining area. factor the expression.
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michelle95
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|dw:1358539558344:dw|
cwrw238
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remaniing area = x^2 - 4^2
cwrw238
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= x^2 - 16
michelle95
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thanks
cwrw238
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this factors to
(x + 4)(x - 4)
(the difference of 2 squares)
cwrw238
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yw