Question

Evaluate the expression for the given value of the variable(s). -x2 - 4x; x = -3 Question 4 options:

Answer 1

ANSWER

The value of the expression is

`3`



Step-by-step explanation

The given expression is


`- {x}^(2) - 4 x`

We want to evaluate this expression at


`x = - 3`

This means that, we have to substitute -3 wherever we see x in the given expression.


This will give us,


`- ( { - 3)}^(2) - 4( - 3)`

We evaluate the first parenthesis to get,

`- 9 - 4( - 3)`


We now multiply the second parenthesis to get,


`- 9 + 12`

This is the same as,


`12 - 9 = 3`

Answer 2

-x^2-4x
x=-3→-(-3)^2-4(-3)=-9+12=3

Answer: 3