PEMBUKTIAN AxB =-(AxB)

A x B =-(AxB)

Misal AxB =C

0 = 0

A x 0 = C+(-C)

A(B +(-B)) = C+(-C)

AxB +(-AxB) = C+(-C) hukum distributif

AxB +(-AxB) =  C+(-C)

-AxB = -(AxB)

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