Question

Evaluate the following expression using the values given.

Find 2x2 - 2z4 + y2 - x2 + z4 if x = -4, y = 3, and z = 2.

Numerical Answers

Answer 1

@jim_thompson5910

Answer 2

Did you mean

\[\Large 2x^2 - 2z^4 + y^2 - x^2 + z^4\]

???

Answer 3

yes

Answer 4

replace every copy of x with -4
replace every copy of y with 3
replace every copy of z with 2

\[\Large 2x^2 - 2z^4 + y^2 - x^2 + z^4\]

\[\Large 2(-4)^2 - 2(2)^4 + (3)^2 - (-4)^2 + (2)^4 = ???\]

Answer 5

at this point, you compute the value of the expression above (either by hand or using a calculator)

Answer 6

this is very complicated to me .

Answer 7

\[\Large 2(-4)^2 - 2(2)^4 + (3)^2 - (-4)^2 + (2)^4\]

is `2(-4)^2 - 2(2)^4 + (3)^2 - (-4)^2 + (2)^4`

Answer 8

type `2(-4)^2 - 2(2)^4 + (3)^2 - (-4)^2 + (2)^4` into your calculator

if you do not have a calculator, you can use this one

http://web2.0calc.com/

see attached image

Answer 9

take note how I use the ^ symbol to mean exponent

example: \[\Large 3 \wedge 7 = 3^7 \]

also make sure you don't leave out any parenthesis

Answer 10

what result do you get?

Answer 11

9?

Answer 12

@jim_thompson5910

Answer 13

9 is correct

Answer 14

thank you so much!