Special Products Difference of Two Squares

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In this video, we give a few examples of how to use the formula for the difference of two squares.
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I love your vids they are reely help-full

jaymeeguapo
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Hey, i stumbled on a problem in my math book: and the answer i got was: 2x^2y^3 -2x^2y^2 -7xy^3 +3x^2y . The answer in my book is different. It is: 3x^2y -2x^2y^2 +2x^2y^3 - 7xy^3 .

Please help because this dosntmake sense to me!

abdua