Question

Dada A Função f(x)= x² -4x+3 determine Os Valores de f(2) f(-1)

Answer 1

$f(2) = {x}^{2} - 4x + 3 \\ f(2) = {2}^{2} - 4 \times 2 + 3 \\ f(2) = 4 - 8 + 3 \\ f(2) = - 1 \\ \\ \\ f( - 1) = {x}^{2} - 4x + 3 \\ f( - 1) = {( - 1)}^{2} - 4 \times ( - 1) + 3\\ f( - 1) = 1 + 4 + 3 \\ f( - 1) = 8$