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How do you multiply #(x^2-7y)^2#?

1 Answer

Nov 7, 2016

#x^4 - 14yx^2 + 49y^2

Explanation:

#(x^2 - 7y)^2 =>#

#(x^2 - 7y)(x^2 - 7y) =>#

#x^2x^2 - x^2(7y) - x^2(7y) + 7y7y =>#

#x^4 - 2*(7yx^2) + 49y^2 =>#

#x^4 - 14yx^2 + 49y^2#

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