Evaluate
2\left(4R+\alpha -549\right)
Factor
2\left(4R+\alpha -549\right)
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2\alpha +8R+42-1140
Multiply 57 and 20 to get 1140.
2\alpha +8R-1098
Subtract 1140 from 42 to get -1098.
2\left(\alpha +4R-549\right)
Factor out 2.
4R+\alpha -549
Consider \alpha +4R+21-570. Multiply and combine like terms.
2\left(4R+\alpha -549\right)
Rewrite the complete factored expression.
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