Question

The value of f (x) = 5x - 4x²+3 when. x= -1, is
o a 3
o b12
o c 6
o d 6​

Answer 1

Answer:

$f(x) = 5x - 4x {}^{2} + 3 \\ x = - 1 \\ then \: \: \: \: f( - 1) = 5 \times ( - 1) - 4 \times ( - 1) {}^{2} + 3 \\ - 5 - 4 + 3 \\ f( - 1) = - 6 \: \: \: \: \: \: \: \: ans.$

Hope it will help you.

Answer 2

the value of (x) is -1

(x) = 5x - 4x² + 3

(-1) = 5(-1) - 4(-1)² + 3

= -5 - 4(1) +3

= -5 -4 + 3

= -9 + 3

= -6

this option is not correct

Ans is -6