Question

2-1=3 3-4=7 4-9=13 5-16=21 6-25=? 3-81=?

Answer 1

Answer:

2-1= 3 3-4= 7 4-9= 13 5-16 =21 6-25= 31 3-81=84

Answer 2

Answer:

step by step 2+1=3 3+4=7 4+9=13