oscar500 oscar500
  • 18-11-2016
  • Mathematics
contestada

7z-9z is equivalent to wich of the following
a. -2
b. -2z
c. -2z2

Respuesta :

KeaneNR KeaneNR
  • 18-11-2016
When subtracting terms like these, you need to subtract the coefficients.
7-9=-2

But don't forget that z which means the answer is B. -2z
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