Complete the following exercise:(−7)⋅(−3)= (-7)\cdot(-3)= (−7)⋅(−3)=
Let's recall the rule:
(−x)×(−x)=+x (-x)\times(-x)=+x (−x)×(−x)=+x
Therefore, the sign of the exercise result will be positive:
−7×−3=+21 -7\times-3=+21 −7×−3=+21
21 21 21