Question

I just recieved this question on homework and have been working on it for quite some. Need help!

Evaluate the following expression using the values given:

Find 3x2 - y3 - y3 - z if x = 3, y = -2, and z = -5.

Numerical Answers Expected!

Answer 1

\[3x^2 - y^3 - y^3 - z\] if \[x = 3, y = -2, and z = -5.\]

Answer 2

@satellite73

Answer 3

OS is messed up, can you fix it?

Answer 4

@Preetha

Answer 5

no

Answer 6

What's wrong with it?

Answer 7

Wait what?

Answer 8

first off \[3x^2 - y^3 - y^3 - z=3x^2-2y^3-z\]

Answer 9

Im sorry im a little confused.

Answer 10

then
\[3\times 3^2-2\times (-2)^3-(-5)\] is what you need to compute

Answer 11

Ah I see

Answer 12

i would use a calculator
http://www.wolframalpha.com/input/?i=3*3^2-2*+%28-2%29^3-%28-5%29

Answer 13

So 3x3^2 - 2 x (-2)^3 - (-5) Should give me my answer?

Answer 14

So my answer is 48?

Answer 15

So my answer would be 48?

Answer 16

@satellite73

Answer 17

3x^2 - y^3 - y^3 - z when x = 3, y = -2 and z = -5

lets sub
3(3^2) - (-2^3) - (-2^3) -(-5)
3(9) - (-8) - (-8) + 5
27 + 8 + 8 + 5
27 + 21 = 48

thats what I got

Answer 18

Oh I see thank you! I got the same answer.

Answer 19

great minds think alike :)

Answer 20

Lol.