lulukayy lulukayy
  • 03-02-2020
  • Mathematics
contestada

What is the value of c so that -10 and 10 are both solutions of x2 -c=70?

Respuesta :

KaptenASP KaptenASP
  • 03-02-2020

Answer:

c = 30

Step-by-step explanation:

since:

[tex]{(10)}^{2} = { (- 10)}^{2} [/tex]

once we find a c value for 10, we know that it will work for - 10 as well

[tex] {x}^{2} - c = 70[/tex]

we can sub in 10 to get

[tex] {10}^{2} - c = 70 \\ c = 100 - 70 \\ c = 30[/tex]

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