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題目

解題步驟

1. Understand the question

   write an expression equivalent to $-4(5d + 2)$.
   $-4(5d + 2)=square d -?$

2. Explanation

   Step1: Distribute -4 to 5d

   $\boldsymbol{-4 \times 5d = -20d}$

   Step2: Distribute -4 to 2

   $\boldsymbol{-4 \times 2 = -8}$

   Step3: Rewrite as subtraction

   $-20d - 8$ (since $-20d + (-8) = -20d - 8$)

3. Final answer

   $-4(5d + 2) = \boldsymbol{-20}d - \boldsymbol{8}$

答案

Question Analysis

OCR Text

write an expression equivalent to $-4(5d + 2)$.
$-4(5d + 2)=square d -?$

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