Question

If p(x) = 5x-4x2 + 3, find p(-1).

Answer 1

p(-1)=5(-1)-4(-1)2+3
=-5+8+3
=11-5
= 6

Answer 2

Given:

The equation of a polynomial is given as p(x) = 5x - 4x² + 3

To find:

The value of p(-1).

Solution:

To find the value of the function at -1, we need to substitute -1 with x. On doing so, the equation will become:

p(-1 ) = 5(-1) - 4(-1)² + 3

On simplifying the equation, we would get:

p(-1 ) = -5 - 4 + 3

p(-1) = -9 + 3

On further simplifying:

p(-1) = -6

Thus, the value of the function at -1 will be -6.