Question

help will give medal


Evaluate the following expression using the values given:

Find x3 − 2y2 − 3x3 + z4 if x = 3, y = 5, and z = −3. (1 point)


−185
−77
−23
85

I get - 26 but it not an answer

Answer 1

if x = 3, y = 5, z = -3
The expression would be shown as
(3)3 - 2(5)\[(3)^{3} - 2(5)^{2} - 3(3)^{3} + -3^{4}\]2

Answer 2

please ignore the half-way expressions on the top and bottom. lol

Answer 3

ok lol and I got that far but I don't know what to do from there cause I obviously did something wrong lol

Answer 4

OK
Let's work through this together. :-)
What is \[3^{2}\] ??

Answer 5

i mean 3 to the 3rd power omg

Answer 6

9 lol bout to say that

Answer 7

now what is 2 x 5 to the 2 power?

Answer 8

100 ??

Answer 9

oh gosh. noooo

Answer 10

it's 50

Answer 11

I'll just simply give you the answer, it's -23

Answer 12

Try it on your computer's calculator. it will give you so much help lol

Answer 13

im so stupid :( lol

Answer 14

NO, don't ever say that. You just haven't gotten the hang of what your lesson's teaching you about. I can explain on how I did it . if youd like me to. ? (:

Answer 15

ya sure maybe ill see where I messed up again lol

Answer 16

ight ight (:
so you know how the question tells you what number the variables mean?
like x = 3, y = 5, z = -3
well, all you gotta do next time, is rewrite it on a piece of paper and basically substitute the variables to the numbers that the question listed. and if there's any powers, you multiply, and if there's any in parenthesis, you include that number in with what you're multiplying. is this making sense ? @shadow2239

Answer 17

so if it was 2 (5) ^2
I would add 2 +5 and do 6^2
????

Answer 18

No, shadow. You would multiply,
2(5) means to multiply because they're close together and there's really nothing there to prove that you have to add. and well...since 2 x 5 equals 10, you multiply 10 twice.

Answer 19

because it has a power of 2.

Answer 20

so it would be 20 then ?

Answer 21

no no
\[10^{2}\] does not mean 10 x 2 it means, 10 x 10.
you're multiplying 10 TWICE not by two. :c

Answer 22

then it would be 100

Answer 23

Yes.

Answer 24

can you tell me if this is right -3(2)^2-(-1)^3+3(3)^2-2(-1)^3

I simplified and got 48 is that right ????