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Popolare Word Problems >

If a number is subtracted from five times its square, the result is four. Find all such numbers.

Soluzione

I f a n u mb er i s s u b t r a c t e d f ro m f i v e t im es i t s s q u a re, t h e res u lt i s f o u r . F in d a ll s u c h n u mb ers .

Soluzione

The number : 1 or - \frac{4}{5}

Fasi della soluzione

Represent the number with

x

A.T.Q.:

5 x^{2} - x = 4

Risolvi per

x, 5 x^{2} - x = 4 : x = 1, x = - \frac{4}{5}

The number : 1 or - \frac{4}{5}

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