viv4444
viv4444 viv4444
  • 17-08-2021
  • Mathematics
contestada

Solve for x: 2x^2 - 18 = 0

please give detailed steps!!

Respuesta :

Аноним Аноним
  • 17-08-2021

Answer:

[tex]x = 3[/tex]

or

[tex]x = - 3[/tex]

Step-by-step explanation:

Set up equation

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

Add 18 on both sides

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

Divide both sides by 2.

[tex] {x}^{2} = 9[/tex]

Take the square root of 9

Remeber square root solutions produce positive and negative Solutions.

[tex]x = 3[/tex]

[tex]x = - 3[/tex]

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