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人気のある Word Problems >

Five less than a number squared is 30 more than twice the number. Find the number.

解

F i v e l ess t han a n u mb er s q u a re d i s 30 m ore t han tw i ce t h e n u mb er . F in d t h e n u mb er .

解

The number : 7 or - 5

解答ステップ

Represent the number with

x

A.T.Q.:

x^{2} - 5 = 30 + 2 x

x

を解く

x^{2} - 5 = 30 + 2 x : x = 7, x = - 5

The number : 7 or - 5

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