(-1)(-1)-1=

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Solution for (-1)(-1)-1= equation: 


Simplifying
(-1)(-1) + -1 = 0

Multiply -1 * -1
1 + -1 = 0

Combine like terms: 1 + -1 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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