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Please expand this expression and let me know step by step how you got to it. thx :)

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Expanding in math............?

(x-y)(x^2-12xy+20y^2)

asked Apr 24, 2013 in PRE-ALGEBRA by homeworkhelp Mentor

1 Answer

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(x - y)(x2 - 12xy + 20y2)
 

Use the Distributive Property:
= x(x2 - 12xy + 20y2) - y(x2 - 12xy + 20y2)

 

Use the Distributive Property twice more:
= x3 - 12x2y + 20xy2 - x2y + 12xy2 - 20y3

Combine like terms:
= x3 - 13x2y + 32xy2 - 20y3

answered Apr 24, 2013 by casacop Expert

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