form a real polynumal
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1 Answer

Multiplicity factor: (x+4)²=x²+8x+16.

Complex factor: (x-5-5i)(x-5+5i)=x²-10x+25+25=x²-10x+50.

Polynomial: (x²+8x+16)(x²-10x+50)=


    +8x³ -80x²+400x

           +16x² -160x+800=

x⁴-2x³-14x²+240x+800 and any multiple of this polynomial.

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