10
practice testMultiple Choice

Practice Test

Question 10 • Mathematics III

Which expression shows the sum of the polynomials with like terms grouped together? open paren 8 x plus 3 z minus 8 z squared close paren plus open paren 4 y minus 5 z close paren

Answer
A
8 x plus 4 y plus open bracket 3 z plus open paren negative 8 z squared close paren plus open paren negative 5 z close paren close bracket
B
open bracket 8 x plus 4 y plus open paren negative 8 z squared close paren close bracket plus 3 z plus open paren negative 5 z close paren
C
8 x plus 4 y plus open paren negative 8 z squared close paren plus open bracket 3 z plus open paren negative 5 z close paren close bracket
D
open bracket 8 x plus open paren negative 8 z squared close paren close bracket plus 4 y plus open bracket 3 z plus open paren negative 5 z close paren close bracket

Explanation

The like terms are 3z and −5z because both have the same variable, z, to the same power. The other terms, 8x, 4y, and −8z², are not like terms with each other, so they stay separate. Choice A groups 3z and −5z together.

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