SAT Math Practice Question #27549 - SATify | SATify

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SAT Math Practice Question #27549 - SATify | SATify

#27549

algebra

diophantine equations

hard

150 sec

How many ordered pairs of integers $(m, n)$ satisfy the equation $m^{2} + mn + n^{2} = 1$ ?

A.

3

B.

5

C.

6

D.

7

E.

9