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10-05-2017
Mathematics

contestada

7 times a number is 18 less than the square of that number. find the positive solution. answer

Respuesta :

10-05-2017

n = number

7n = 18 - n^2

n^2 + 7n - 18 = 0

(n-2)(n+9)=0

n = 2 and -9

answer is 2

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