Question

para x =1/3 na expressão
x^3-2x^2+x

Answer 1

x^3-2x^2+x(1/3)³ - (2*1/3)² + 1/3
1/27 - 4/9 + 1/3
1 - 12 + 9/27
10 - 12/27
-2/27