jazariaisol2
jazariaisol2 jazariaisol2
  • 07-01-2021
  • Mathematics
contestada

What is the value of x in the eguation +4= 2(X-1)2
O5
11
2
O7

Respuesta :

jcherry99
jcherry99 jcherry99
  • 07-01-2021

Answer:

2 or C

Step-by-step explanation:

I'm taking this to mean

4 = 2(x - 1)^2

4 = 2(x^2 - 2x + 1)

4 = 2x^2 - 4x + 2

2x^2 - 4x - 2  =  0

x^2 - 2x - 1 = 0

What you get from here is sqrt(2) as one of the roots.

That is not nearly an answer.

4 = 4(x -1)

4 = 4x - 4

8 = 4x

x = 8/4

x  =  2

That makes C the answer.

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