syedhuzaifaali7826 syedhuzaifaali7826
  • 03-09-2020
  • Spanish
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The sum of the number and its squre is nine times the next hihest number. Find it​

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MisterBigBrain
MisterBigBrain MisterBigBrain
  • 03-09-2020

Answer:

9

Explanation:

n + n2   =   9 (n + 1)

9 + 92   =   9 (9+1)           (of course, that '92' means '9 squared')

9 + 81    =   9 (10)

 90       =   90

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