Question

Given p(x)=2x^3-3x-5 what is the value of p (-2)

Answer 1

The value of p(x) at -2 is:

`p(-2) = -15`

Explanation:

Given polynomials is:

`p(x) = 2x^3-3x-5`

We have to find p(-2)

This means that we have to find the value of the polynomial at -2. Finding value of a polynomial at a certain number is done by putting the number in the polynomial in place of variable. So putting x = -2

`p(-2) = 2(-2)^3-3(-2)-5\\= 2(-8)+6-5\\= -16+1\\=-15`

Hence,

The value of p(x) at -2 is:

`p(-2) = -15`