(3r2 + 7r + 1) + (4r2 – 8r – 2)
A. 7r2 + 15r – 1
B. 7r2 – r – 1
C. 7r2 – 15r – 3
D. –r2 – r – 1
Combining like terms, we get:
(3r^2 + 7r + 1) + (4r^2 - 8r - 2) = 7r^2 - r - 1
Therefore, the answer is option B. 7r2 – r – 1.
A. 7r2 + 15r – 1
B. 7r2 – r – 1
C. 7r2 – 15r – 3
D. –r2 – r – 1
(3r^2 + 7r + 1) + (4r^2 - 8r - 2) = 7r^2 - r - 1
Therefore, the answer is option B. 7r2 – r – 1.