Question

Find x^3-2y^2-3x^3+z^4 if x = 3, y = 5, and z = -3

Answer 1

so, what are your thoughts on how to begin?

Answer 2

I need help

Answer 3

well...first sub in 3 for x, 5 for y, and -3 for z

Answer 4

answer please

Answer 5

no...do your subbing

Answer 6

um if i knew i wouldnt be asking

Answer 7

we can do this together

Answer 8

have you read about substitution lately in class? what do you usually do for something like this: \(a+4=?\) let a=1 what is the answer?

Answer 9

ok...lets do our subbing..x = 3, y = 5, and z = -3
I don't have much time so let me just do this..
x^3 - 2y^2 - 3x^3 + z^4
3^3 - 2(5^2) - 3(3^3) + (-3^4)
27 - 2(25) - 3(27) + (- 81)
27 - 50 - 81 - 81
27 - 212
- 185

Answer 10

do you have any questions at all ?