Solved: Simplify (c2 - 6cd - 2d2) + (7c2 - cd + 8d2) - (-c2 + 5cd - d2)
Chapter 6, Problem 40(choose chapter or problem)
Simplify (c2 - 6cd - 2d2) + (7c2 - cd + 8d2) - (-c2 + 5cd - d2).
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