Question

The value of f(x)=5x-4x²+3 when x= -1 is​

Answer 1

Answer:

x =-1

f(-1) =(5 x -1)-(4x(-1) ^2) +3

= -5-4+3

= -9+3

= -6.

The value of f(x)=5x-4x²+3 when x= -1 is -6

mark it brainliest if it helps you

by shagun

Answer 2

Given :-

$f(x) = 5x - {4x}^{2} + 3$

$(x) = - 1$

To,

Value of x

solution :-

$f(x) = 5x - {4x}^{2} + 3$

$f( - 1) = 5( - 1) - {4( - 1)}^{2} + 3$

$- 5 - 4 + 3$

$- 6$

______________________________________

$\therefore$ the value of x is -6