lexus1010 lexus1010

17-05-2017
Mathematics

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Factor the following polynomial completely. -x2y2 + x4 + 9y2 - 9x2

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IzzyandMak IzzyandMak

17-05-2017

factor by grouping, -x2y2+9y2= y2(-x2+9)
x4-9x2=- x2(-x2+9)
= (y2-x2)(-x2+9)

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