Question

if f(x) = x²-5x+1 then find f(-1)​

Answer 1

Solution:-

$\implies \: f(x) = {x}^{2} - 5x + 1$

$\implies \: f( - 1) = { - 1}^{2} - 5( - 1) + 1$

$\implies \: f( - 1) = 1 - ( - 5) + 1$

$\implies \: f( - 1) = 1 + 5 + 1$

Final answer:-

$\implies \: f( - 1) = 7$