(x+1)(x+2)(x+3)(x+4)-15
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herw is your answer
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Step-by-step explanation:
=(x^2 + 3x + 2) ( x^2 + 7x + 12) - 15
= x^4 + 10x^3 + 35 x^2 + 50x +24 - 15
=x^4 + 10x^3 + 35 x^2 + 50x +9
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