First simplify and then evaluate: when x = 3, y = 1.2, find the value of 2 times the square of x-3y

First simplify and then evaluate: when x = 3, y = 1.2, find the value of 2 times the square of x-3y


First 2 * 3 * 3 equals 18, then subtract 3 * 1.2, and finally 14.4
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