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How do you evaluate xy - z, when x = -2, y = 3 and z = 1?

Answer 1

Genesis Allen

#-7#

#"substitute the given values into the expression"#

#rArrxy-z#

#=(color(red)(-2)xxcolor(blue)(3))-color(magenta)(1)#

#=-6-1=-7#

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Answer 2

Eli Assouline

#xy-z=-7#

An algebraic equation is one that we just plug in the values for.

#-># Note #xy# means #x xx y#

#-> xy-z -> -2xx3-1#

#-2xx3=-6#

#-6-1=-7#

#therefore# #xy-z=-7#

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Answer 3

Jameson Allen

To evaluate ( xy - z ) when ( x = -2), ( y = 3), and ( z = 1), substitute the given values into the expression:

( xy - z = (-2)(3) - 1 = -6 - 1 = -7).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.