Complete the following exercise:(−1)⋅(−1)= (-1)\cdot(-1)= (−1)⋅(−1)=
Let's recall the law:
(−x)×(−x)=+x (-x)\times(-x)=+x (−x)×(−x)=+x
Therefore, the sign of the exercise result will be positive:
−1×−1=+1 -1\times-1=+1 −1×−1=+1
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