(-1+1)(-1-4)(-2-1)=

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Solution for (-1+1)(-1-4)(-2-1)= equation: 


Simplifying
(-1 + 1)(-1 + -4)(-2 + -1) = 0

Combine like terms: -1 + 1 = 0
(0)(-1 + -4)(-2 + -1) = 0

Combine like terms: -1 + -4 = -5
0(-5)(-2 + -1) = 0

Combine like terms: -2 + -1 = -3
0 * -5(-3) = 0

Multiply 0 * -5
0 * -3 = 0

Anything times zero is zero.
0 * -3 = 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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