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matrenka [14]
4 years ago
10

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

Mathematics
2 answers:
mariarad [96]4 years ago
8 0
-x^2-4x
x=-3→-(-3)^2-4(-3)=-9+12=3

Answer: 3
kari74 [83]4 years ago
6 0
ANSWER

The value of the expression is
3



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

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