Question

Identify the step where an error first occurred. Step 1(-2n+ n° - 7n") + (-n" +4% +12n) Step 2-2n+ n- 7n3 - n1 +4n3 + 12n2 Step 32n" - 3n3 + 14n2 Step 1 Step 2 Step 3 No error

Answer 1

EXPLANATION

Step 1 ---> Grouping in terms

Step 2 is well done ---> Removing the parentheses

Step 3 has an error ---> It's -3n^2