AngelinaeSoto AngelinaeSoto
  • 11-03-2020
  • Mathematics
contestada

find the number of real number solutions for the question.
x^2-15=0

Respuesta :

hellohi14 hellohi14
  • 11-03-2020

Answer:

7.5

Step-by-step explanation:

you are trying to figure out what the equation equals so what times two equals 15? 7.5 and 15-15 equals 0

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Hrishii
Hrishii Hrishii
  • 11-03-2020

Step-by-step explanation:

[tex] {x}^{2} - 15 = 0 \\ \\ \therefore \: {x}^{2} = 15 \\ \\ \therefore \: x = \pm \sqrt{15} \\ \\ \therefore \: x = \sqrt{15} \: \: or \: \: x = - \sqrt{15} \\ \\ \therefore \: x = \{ - \sqrt{15}, \: \: \sqrt{15} \} \\ [/tex]

henc, there are two real solutions.

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