Solve the nonlinear system.y2 + 4x2 = 21 y2 - x2 = 1
A. (2, 
), (2, -
)
B. (3, 
), (3, -
), (-3, 
), (-3, -
)
C. (2, 
), (2, -
), (-2, 
), (-2, -
)
D. no real solution
Answer: C
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?
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.
A.
| mm |
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