Factorising the Difference of Two Squares

Question 1:

x2 64
x + 8 x 8

Question 1:

x2 4
x + 2 x 2

Question 1:

x2 64
x + 8 x 8

Question 1:

x2 36
x + 6 x 6

Question 1:

25 x2 64
5 x + 8 5 x 8

Question 1:

4 x2 49
2 x + 7 2 x 7