Question

A student simplifies (6b + 4r) – (2b + r) and says that the result is 4b + 5r. Explain the error and describe the correct steps to simplify the expression.

Answer 1

Third option ✔ 4b + 3r

Explanation:

E D G E N U I T Y

Answer 2

Answer: 4b + 3r

Step-by-step explanation: The student correctly subtracted the 2b, but accidentally added the r instead of subtracting it, she likely misunderstood the parentheses.

The correct answer would be 4b + 3r