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

User Maor Hadad
by
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1 Answer

6 votes
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
User Blhylton
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