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- (3×) ^ 2 / 8 + 2 = 20 - 9× ^ 2 / 8 = 20 - 2 - 9X ^ 2 / 8 = 18 - 9X ^ 2 = 18 * 8 - 9X ^ 2 = 144 - X = √(144 / 9) - X = 12 / 3 X = - 4.

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Anamariaestrella
6

- (3×) ^ 2 / 8 + 2 = 20 - 9× ^ 2 / 8 = 20 - 2 - 9X ^ 2 / 8 = 18 - 9X ^ 2 = 18 * 8 - 9X ^ 2 = 144 - X = √(144 / 9) - X = 12 / 3

X = - 4.