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פּוֹפּוּלָרִי Word Problems >

If one is added to eight times a number, the result is nineteen less than the square of the number. Find all such numbers.

פתרון

I f o n e i s a dd e d t o e i g h t t im es a n u mb er, t h e res u lt i s nin e t ee n l ess t han t h e s q u a re o f t h e n u mb er . F in d a ll s u c h n u mb ers .

פתרון

The number : 10 or - 2

צעדי פתרון

Represent the number with

x

A.T.Q.:

8 x + 1 = x^{2} - 19

8 x + 1 = x^{2} - 19, x

פתור בשביל:

x = 10, x = - 2

The number : 10 or - 2

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