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Populaire Word Problems >

Find a positive real number such that its square is equal to 12 times the number, increased by 405.

Solution

F in d a p os i t i v e re a l n u mb er s u c h t ha t i t s s q u a re i s e q u a l t o 12 t im es t h e n u mb er, in cre a se d b y 405.

Solution

The number : 27

étapes des solutions

Represent the number with

x

A.T.Q.:

x^{2} = 12 x + 405

Solutionner pour

x, x^{2} = 12 x + 405 : x = 27, x = - 15

Select positive solutions:

27

The number : 27

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