Question 560224
Just replace x = -2, y = -3, and z = -5 into the expression and simplify, i.e.


6(-5) + 1 + 4(-2)^2 - 3(-3)^3 + 7(-2) - 8(-3)^2 + 2(-2)^2 - (-2) + 5(-5) – 17



Be careful using the order of operations, and note that a negative number times a negative number equals a positive number. You should get -50 as your answer.

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Identifying variables, constants, and coefficients is quite straightforward. A variable is simply a symbol or letter that represents a number (x,y,z in this case). A constant is a fixed number (-17 in this case), and a coefficient is a constant that is multiplied with a variable.