What is the sum of a^2 + b^2 - 8 and -4b^2+2a^2-17
A. 3a^2-3b^2-25
B. 3a^2+3b^2+25
C. 3b^2-3a^2-25
D. -3a^2-3b^2-25
A. 3a^2-3b^2-25
B. 3a^2+3b^2+25
C. 3b^2-3a^2-25
D. -3a^2-3b^2-25
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d. 3a^2 - 3b^2 - 25
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