The simplified expression of 6(d - 6f) -6f- 3(-7f + 8d) is - 18d- 21f
The expression is given as
6(d - 6f) -6f- 3(-7f + 8d)
Expand the brackets
6(d - 6f) -6f- 3(-7f + 8d) = 6d - 36f - 6f + 21f - 24d
Collect the like terms
6(d - 6f) -6f- 3(-7f + 8d) = 6d - 24d- 36f - 6f + 21f
Evaluate the like terms
6(d - 6f) -6f- 3(-7f + 8d) = - 18d- 21f
Hence, the simplified expression of 6(d - 6f) -6f- 3(-7f + 8d) is - 18d- 21f
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