10. The factors of c2-(c - 3d)2 are – InterviewSolution

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10. The factors of c2-(c - 3d)2 are

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c*c - (c-3d)*(c-3d) = c*c - (c*c - 6cd + 9d*d) = c*c - c*c + 6cd - 9d*d = 6cd - 9d*d = 3d(2c-3d)

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