Discussion
Sum of 2a + b + 5c and -5a - 2b + 3c is
Answer: C
Add the like terms.
\[ a: \ 2 - 5 = -3 \]
\[ b: \ 1 - 2 = -1 \]
\[ c: \ 5 + 3 = 8 \]
\[ \therefore\ -3a - b + 8c \]
The \( c \) terms are both positive, so that coefficient grows while the other two turn negative.
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