Aaliyahsade Aaliyahsade
  • 14-04-2020
  • Mathematics
contestada

What are the solution(s) to the quadratic equation 40 - x2 = 0?

x= 2/10
x = +4/10
x = +2/5
x= +4/5

Respuesta :

Hrishii
Hrishii Hrishii
  • 14-04-2020

Step-by-step explanation:

[tex]40 - {x}^{2} = 0 \\ \therefore \: {x}^{2} = 40 \\ \therefore \: x = \pm \sqrt{40} \\ \therefore \: x = \pm \sqrt{4 \times 10} \\ \huge \red{ \boxed{\therefore \: x = \pm 2\sqrt{10}}}[/tex]

Answer Link
Аноним Аноним
  • 14-04-2020

Start with

[tex]40-x^2=0[/tex]

Add [tex]x^2[/tex] to both sides:

[tex]x^2=40[/tex]

Take the square root of both sides:

[tex]x=\pm\sqrt{40}=\pm\sqrt{4\cdot 10}=\pm 2\sqrt{10}[/tex]

Answer Link

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