#Further a level summations

5 messages · Page 1 of 1 (latest)

upbeat ibex
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I get whags going on but how has it become simplified to the last step?

20250219_195455.jpg
idle ospreyBOT
upbeat ibex
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Pls help guys I bet it's sm stupid

sacred sage
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It was factored

tired moth
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@upbeat ibex Pretty much the only way to factorize like this is to:

  • Develop the numerator, you'll get: 2n^3 + 15n^2 + 13n -420
  • "Notice" that 4 is a zero of this 3rd degree function
  • Therefore be able to factorize that by (n-4)