Given that a (negative 3a, 5) B (6.2b) is symmetric about y axis and ab is parallel to X axis, the values of a and B are obtained

For Y-axis symmetry, then the value of X is the opposite number, and parallel to x-axis, then the value of Y is the same, then - 3A + 6 = 0, 2b = 5, so a = 2, B = 2.5

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