welikefortnitecough welikefortnitecough
  • 13-05-2021
  • Mathematics
contestada

The square of a certain number is 4 less than 4 times that same number. What is the value of the number?

Select one:
A. -2
B. -1
C. 0
D. 2

Respuesta :

fetgp
fetgp fetgp
  • 13-05-2021
x^2 = 4x - 4
turn it into a quadratic by bringing the right to the left
x^2 - 4x + 4 = 0
factorise the quadratic
( x - 2 )^2 = 0
x - 2 = 0
x = 2
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