Perform the indicated operations.(x2 + 1) - (9x2 - 9) + (x2 + x + 3)
A. -7x2 + x + 13
B. -9x2 + x + 13
C. -7x2 - 8x + 4
D. -8x2 + x + 13
Answer: A
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A. 8 and 6 B. - 8 and - 6 C. 8 and - 6 D. - 8 and 6
Solve the system by the addition method.x2 + y2 - 4x + 8y + 19 = 0 x2 - y2 - 4x - 8y - 13 = 0
A. {(3, -4), (-1, -4)} B. {(3, -4), (1, -4)} C. {(2, 3), (2, 5)} D. {(2, -3), (2, -5)}
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