Question

Evaluate the following expression using the values given:
Find x3 - 2y2 - 3x3 + z4 if x = 3, y = 5, and z = -3.

Sooo confused :( no matter what I do I just can't figure it out

Answer 1

All this question is asking is to substitute the values given for x,y, and z into the given expression, so really all it wants you to do is replace 'x' with 3, 'y' with 5, etc. Try just writing it out that way :3

Answer 2

Also, remember that something like z4 means z times 4!

Answer 3

the numbers after the letter is exponents
Find x^3 - 2y^2 - 3x^3 + z^4 if x = 3, y = 5, and z = -3.

Answer 4

ok let me try 3^3-2(5)^2-3(3)^3+(-3)^4= i rewrote it now what??

Answer 5

Now you have a string of numbers and operations which are all arithmetic, so go through the order of operations (parenthesis, exponents, multiplication, division, addition, subtraction) and apply the operations, eventually, you will end up with one number!

Answer 6

will you wait while i figure it out?

Answer 7

Of course!