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

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Answer 1 · 2018-03-10T14:23:24

#-7#

#"substitute the given values into the expression"#

#rArrxy-z#

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

#=-6-1=-7#

Answer 2 · 2018-03-10T14:24:44

#xy-z=-7#

When given an algebraic equation, we simply plug in the values.

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

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

#-2xx3=-6#

#-6-1=-7#

#therefore# #xy-z=-7#