SOLUTION: If twice a number is added to it's square.the result is 143.find the number

SOLUTION: If twice a number is added to it's square.the result is 143.find the number

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Question 1091926: If twice a number is added to it's square.the result is 143.find the number

Answer by ikleyn(52896) (Show Source): You can put this solution on YOUR website!
.

 = 143.


 = 143,

 = 143 + 1,

 = 144  ====>

x + 1 = +/-  = +/- 12.

x = -1 + 12 = 11  and  x = -1 - 12 = -13.

Answer. There are 2 solutions: 11 and -13.

Solved.

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