1.

If a and b are integers of opposite signs such that (a + 3)2 : b2 = 9 : 1 and (a - 1)2 : (b - 1)2 = 4 : 1, then the ratio a : b is?

A. 9 : 4
B. 81 : 4
C. 1 : 4
D. 25 : 4
Answer» E.


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