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Using the distributive property of multiplication over addition, 2*[2 - 2] = 2*[2 + (-2)] = 2*2 + 2*(-2)LHS = 2*0 = 0
RHS = 4 + 2*(-2)
Therefore 2*(-2) = -4 and, by commutativity, -2*2 = -4
Next
-2*[2 - 2] = -2*[2 + (-2)] = -2*2 + -2*(-2)
LHS = -2*0 = 0
RHS = -4 + -2*(-2)
Therefore -2 times -2 = +4
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