Question

if f(x) = 5x- 4x²+3 then findthe value of f(-1)

Answer 1

ANSWER:

$f(x) = 5x - 4 {x }^{2} + 3 \\ \\ putf = (- 1) \\ f = 5( - 1) - 4 {( - 1)}^{2} + 3 \\ = - 5 - 4 + 3 \\ = - 9 + 3 \\ = - 6$