Question

Evaluate the expression for the given value of the variable(s).

-x2 - 4x; x = –3

B. –17
C. 11
D. 3

Answer 1

Just replace "x" with -3

Answer 2

When you replace "x" with -3, what does your problem look like?

Answer 3

@bvbarmy17

Answer 4

-(3)2-4(-3);x=-3

Answer 5

@Whitemonsterbunny17

Answer 6

Yes. So you know PEMDAS?

Answer 7

yes

Answer 8

Okay, so tell me what PEMDAS stands for.

Answer 9

Parentheses Exponents Multplicaton Divide Add Subtract

Answer 10

Basically, yes.
\(\normalsize\bf\color{red}P\color{gold}E\color{lime}M\color{cyan}D\color{blue}A\color{purple}S\):

\(\normalsize\bf\color{red}P\)arentheses
\(\normalsize\bf\color{gold}E\)xponents
\(\normalsize\bf\color{lime}M\)ultiplication
\(\normalsize\bf\color{cyan}D\)ivision
\(\normalsize\bf\color{blue}A\)ddition
\(\normalsize\bf\color{purple}S\)ubtraction

We have no real parentheses, so we move on. There are also no exponents, so next is:
PE\(\normalsize\bf\color{lime}M\)DAS

\(\normalsize\bf\color{lime}M\)ultiplication

Answer 11

ok

Answer 12

So go ahead, and do the \(\normalsize\bf\color{lime}M\)ultiplication. (:

Answer 13

-6-12

Answer 14

-6-12=-18

Answer 15

Yeah. I got the same thing.

Answer 16

but its not answer c hoice

Answer 17

Maybe they had a typo and meant -18.

Answer 18

Instead of -17

Answer 19

yea maybe

Answer 20

ill pick "B" its the closes

Answer 21

Okay, tell me if it was right. (:

Answer 22

ok

Answer 23

they said it was wrong

Answer 24

Really? >.<

Answer 25

yea idk what it is then

Answer 26

No matter what I try, I'm still getting -18 as the result.

Answer 27

-(-3)2-4(-3)=
6+12=
+18