Question

Given f(x)=3x2−5x−2 . What is the value of f(−23) ?

Answer 1

$f(x) = {3x}^{2} - 5x - 2 \\ f( - 23) = ... \\ f( - 23) \: means \: x = - 23 \\ so \: f( - 23) = {3( - 23)}^{2} - 5( - 23) - 2 \\ = 3(529) + 115 - 2 \\ = 1700$