jxpiter04 jxpiter04

25-06-2019
Mathematics

contestada

the sqaure of 9 less than a number is 3 less than the number

Respuesta :

altavistard altavistard

03-07-2019

Answer:

n: {7, 12}

Step-by-step explanation:

(n - 9)^2 = n - 3, or

n² - 18n + 81 = n - 3

Rewriting this into the form of a quadratic, we get:

n² - 19n + 84 = 0, or

(n - 7)(n - 12) = 0

Then n: {7, 12}

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