SOLUTION: what is the working for x^2-4x+4 ....using the quadratic formula?

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Question 858288: what is the working for x^2-4x+4 ....using the quadratic formula?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
a= 1 , b= -4 , c= 4

b^2-4ac= 16 + -16
b^2-4ac= 0
%09sqrt%28%090%09%29=%090%09
x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29
x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29
x1=( 4 + 0 )/ 2
x1= 2
x2=%28-b-sqrt%28b%5E2-4ac%29%29%2F%282a%29
x2=( 4 0 ) / 2
x2= 2
The root is 2