Question

1. The value of f(x) = 5x−4x 2 +3 when x = -1, is: a. 3 b. -12 c. -6 d. 6

Answer 1

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

Answer 2

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