Question

The steps for finding a factor of the algebraic expression $7a+21b+56$ are given. Find the first error, if any.
Step 1: 7 is a common factor of each term.
Step 2: $7\left(a\right)+7\left(3b\right)+7\left(8\right)$
Step 3: $7(7a+7\times 3b+7\times 8)$

• A. No error
  
• B. Step 2
  
• C. Step 3
  
• D. Step 1
  

Answer 1

The correct option is C Step 3


The steps for finding the factor of the algebraic expression $7a+21b+56$ is:
Step 1: 7 is a common factor of each term.
Step 2: $7\left(a\right)+7\left(3b\right)+7\left(8\right)$
Step 3: $7(a+3b+8)$
Thus, Step 3 has an error.