Question

(-4d - 9e +10f +12) – ( 9d +12e – 18f -20)

Answer 1

Answer:

Remove the parentheses: - 4 d - 9 e + 10 f + 12 - 9 d - 12 e + 18 f + 20

Reorder the like terms: (- 4 d - 9 d) + (- 9 e - 12 e) + (10 f + 18 f) + (12 + 20)

Collect like terms by adding their coefficients: (- 4 - 9) \cdot d + (- 9 - 12) \cdot e + (10 + 18) \cdot f + (12 + 20)

Calculate the first two terms: - 13 d + (- 9 - 12) \cdot e + (10 + 18) \cdot f + (12 + 20)

Calculate the first two terms: - 13 d - 21 e + (10 + 18) \cdot f + (12 + 20)

Calculate the first two terms: - 13 d - 21 e + 28 f + (12 + 20)

Calculate the first two terms: - 13 d - 21 e + 28 f + 32

Answer: - 13 d - 21 e + 28 f + 32

Step-by-step explanation:

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Answer 2

Answer:

-4d - 9e + 10f + 12

(-) 9d + 12e- 18f - 20

ans.... -13d - 21e + 28f + 32.