Question

solve for x: (2x-4)^2=1

A. 2,3
B. 3/2, 5/2
C. 3/2, 3/5
D.3/2, -5/2

Answer 1

x=(sqrt(1)+4)/2

Answer 2

hi can you help me. I t is posted in chemiisty

Answer 3

from the looks of it, they want you to use the quadratic formula

(2x-4)^2=1

multiply that out

4x² - 8x + 16 = 1
subtract 1 from both sides

4x² - 8x + 15 = 0

now use the quadratic formula...this will give you 2 results...which IS what you are looking for

\[\frac{ -b \pm \sqrt{b² - 4ac} }{ 2a }\]

in your case ...
a = 4
b=-8
c = 15

just plug those number into that equation...and you'll get your answers