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7.12 1. 1/8+/7/12. 24-12-7. (√12-√7) (√12+√7). 3 20 7 12 1 2 79 80.
1/8+/7/12. 24-12-7. (√12-√7) (√12+√7). 3 20 7 12 1 2 79 80.

See also