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15-04-2016
Mathematics

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What is 5x^2+4x=80 times x^2-5x-24=0

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Cotsios1016 Cotsios1016

15-04-2016

(5x²+4x-80)(x²-5x-24)=5x²(x²-5x-24)+4x(x²-5x-24)-80(x²-5x-24)
{distributive property of multiplication}
=5x^4-25x³-120x²+4x³-20x²-96x-80x²+400x+1920
=5x^4-21x³-220x²+304x+1920
This is the answer.

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