eddie22717 eddie22717
  • 02-01-2020
  • Mathematics
contestada

When 18 is subtracted from the square of a number, the result is 3 times the number. Find the negative solution.

Respuesta :

bayosanuade
bayosanuade bayosanuade
  • 03-01-2020

Answer: x = -3

Step-by-step explanation:

Let the number be x , that is the square of x is [tex]x^{2}[/tex].

From the first statement :

[tex]x^{2}[/tex] - 18 = 3x

writing the equation in a standard quadratic format , we have

[tex]x^{2}[/tex] - 3x - 18 = 0

Factorizing , we have

(x - 6 )(x + 3 ) = 0

x - 6 = 0 or x + 3 = 0

Therefore :

x = 6 or x = -3

Therefore , the negative solution implies x = -3

Answer Link
ssjqj ssjqj
  • 07-04-2020

Answer:-3

Step-by-step explanation:

Answer Link

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