shaniakragt shaniakragt

09-12-2018
Mathematics

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If 5 times the square of an integer is added to 3 times the integer, the result is 2. Find the integer. (Simplify your answer completely.)

Respuesta :

MrBillDoesMath MrBillDoesMath

09-12-2018

Hello from MrBillDoesMath!

Answer: x = -1

Discussion:

Let x be the unknown integer. Then

5 x^2 + 3x = 2 or

5x^2 + 3x -2 = 0 or (factoring)

(x+1) ( 5x -2) = 0

so x = -1 (the other value of x, +2/5, is not an integer)

Thank you,

MrB

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