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Algebraic identities

Draw and describe how each of the following algebraic identities could be represented geometrically:

a) (a-b)^2 = a^2 - 2ab + b^2
b) a(b+c)=ab + ac
c) (a+b)(c+d)=ac+bc+ad+bd

Please use illustrations of each with an explanation of the illustration so I can understand the process used to complete this type of problem. THANK YOU!

Solution Summary

This shows how to draw and describe algebraic identities and geometric representation.