Factorising the Difference of Two Squares

Question 1:

x2 196
x + 14 x 14

Question 1:

x2 36
x + 6 x 6

Question 1:

x2 100
x + 10 x 10

Question 1:

x2 9
x + 3 x 3

Question 1:

25 x2 1
5 x + 1 5 x 1

Question 1:

4 x2 64
2 x + 8 2 x 8