(x - 5)(x-4) (x+6) (x+4)= 504.
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Step-by-step explanation:
(x - 5)(x-4) (x+6) (x+4)= 504.
(x²-4x-5x+20)(x²+4x+6x+24)
(x²-9x+20)(x²+10x+24)
x⁴+10x³+24x²-9x³-90x²-216x+20x²+200x+480
x⁴+x³-46x²-16x+480
if it helped you mark it as brainliest answer
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