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Why -1-1 equals 1?

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Anonymous

∙ 16y ago
Updated: 8/17/2019

-1*-1

(-2+1)(-2+1)

-2*-2+1*-2+1*-2+1*1

since multiplication is repeated addition

then

-1*-1*4+(-2)+(-2)+(1)

let -1*-1=x

-1*-1=-1*-1*4-2-2+1

x=x*4-4+1

x=4x-3

3=4x-x

3=3x

3/3=x

1=x

thus -1*-1=x=1

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∙ 16y ago
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