Question

Find the value of f(x)=5x-4xsq+3 when x = -1
​

Answer 1

Answer:

$f(x) = 5x - 4x {}^{2} + 3 \\ given \: \: x = - 1 \\ f( - 1) = 5( - 1) - 4( - 1) {}^{2} + 3 \\ f( - 1) = - 5 - 4 + 3 \\ f( - 1) = - 6$