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(1,5)² = 1,5 * 1,5 = 2,25
- 15² = -(15 * 15) = - 225
(- 15)² = (- 15) * ( - 15) = 225
- (1,5)² = -(1,5 * 1,5) = - 2,25
(- 1,5)² = (- 1,5) * (- 1,5) = 2,25
(5/8)² = (5/8) * (5/8) = 25/64
5/8² = 5 * 1/8 * 1/8 = 5/64
(- 5/8)² = (- 5/8) * (- 5/8) = 25/64