Photos C2 4BC 4B2

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C2 4bc 4b2. AC+2bc-6ab-3a2. А^2 + BC + c2. A^2+B^2=1. (9а2 - 16b 2/4b+3a - a 2 b - 3ab 2/ ab)2.
AC+2bc-6ab-3a2. А^2 + BC + c2. A^2+B^2=1. (9а2 - 16b 2/4b+3a - a 2 b - 3ab 2/ ab)2.

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