Factorising the Difference of Two Squares

Question 1:

x2 − 64
x + 8 x − 8

Question 1:

x2 − 169
x + 13 x − 13

Question 1:

x2 − 16
x + 4 x − 4

Question 1:

x2 − 144
x + 12 x − 12

Question 1:

9 x2 − 16
3 x + 4 3 x − 4

Question 1:

4 x2 − 4
2 x + 2 2 x − 2