Question

For the function f(x)=x,squared-2x+1
Find f(1)
solve f(x)=0

Answer 1

f(1) = 1^2-2·1+1=0

f(x) = 0 ==> x^2-2x+1=0; x= ((2±sqrt(4-4))/2)=1 ==> f(x) = 0 if x=1

Answer 2

f(x) = x^2 -2x+1
f(x)= 1^2- 2(1)+1
f(x)= 1-2+1
f(x) = 0

f(x)= 0
x^2 -2x+1=0
do factorisation
x^2 - x -x +1
x( x-1) -1 ( x-1) =0
(x-1) (x-1) = 0
x =1