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How to turn this into expanded form, 9(x-4)(x+4)(x-5i)(x+5i)

How to turn this into expanded form, 9(x-4)(x+4)(x-5i)(x+5i)
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How to turn this into expanded form, 9(x-4)(x+4)(x-5i)(x+5i)

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User Jeff Sutton
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9(x-4)(x+4)(x-5i) (x+5i)
9x-36(x+4)(x-5i) (x+5i)
9x(x+4)36(x+4)x(x+5i) -5i(x+5i)
9xsquared +36x+36x+144+xsquared+5xi-5xi-25x squared.
9xsquared +72x+25i squared+144
answered
User Nana Partykar
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