Evaluate
2\left(x_{1}-1\right)
Factor
2\left(x_{1}-1\right)
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0+2x_{1}-2
Multiply 0 and -2 to get 0. Multiply -1 and 2 to get -2.
-2+2x_{1}
Subtract 2 from 0 to get -2.
2\left(x_{1}-1\right)
Factor out 2.
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