Question 326941
{{{ (3x^8-5)(x^9-4)}}}
{{{ First:(3x^8)(x^9)=3x^17}}}
{{{ Outer:(3x^8)(-4)=-12x^8}}}
{{{ Inner:(-5)(x^9)=-5x^9}}}
{{{ Last:(-5)(-4)=20}}}
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{{{ (3x^8-5)(x^9-4)=3x^17-5x^9-12x^8+20}}}