For rational numbers x and y, a new operation x * y = ax + by + C is defined, where a, B and C are constants. On the right side of the equation are the usual addition and multiplication operations. Given that 1 * 2 = 9, (- 3) * 3 = 6, 0 * 1 = 2, find the value of (- 2) * 5
From the meaning of the title: a + 2B + C = 9-3a + 3B + C = 6B + C = 2, the solution: a = 2B = 5C = - 3. Therefore, the new operation is x * y = 2x + 5y-3
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