Question

ME AJUDEM!!!! Dada a funçao f(x)=x²-2x+1,determine x para,f(x)=0 ?

Answer 1

só substituir f(x) por 0...
0=x²-2x+1
delta = 4-4 = 0
+2/2 = 1 ,          f(1)=0.

Answer 2

f(x)=x²-2x+1
f(1)= 1²-2•1+1
f(1)= 1-2+1
f(1)= -1+1
f(1) = 0