Factorising the Difference of Two Squares

Question 1:

x2 100
x + 10 x 10

Question 1:

x2 196
x + 14 x 14

Question 1:

x2 121
x + 11 x 11

Question 1:

x2 121
x + 11 x 11

Question 1:

16 x2 64
4 x + 8 4 x 8

Question 1:

9 x2 100
3 x + 10 3 x 10