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How do you factor #a^2(x-y) + 5(y-x)#?

1 Answer

Jun 5, 2016

#(x-y)(a^2-5)#

Explanation:

let's change sign two times:

#a^2(x-y)-5(x-y)#

so we can find the common factor (x-y):

#(x-y)(a^2-5)#

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