x² - 64

x² + 64

x² - 16x + 64

x² + 16x + 64

3(x+3)

x(3+3)

9(x-3)

3x(x+9)

(a+c) (b+c)

a (a+b+c)

(a+b) (b+c)

(a+b)  (a+c)

(k⁴+2)²

(k²+1)²

(k-1)²

r (3 + r)

3r (1 + r)

3 (1 + r)

3r (r + 3)

r² (3 + r)

3r (3 + r)

3r (r² + 3)

3 (r² + 3)

r (s + 1)

s (r + 1)

s (s + r)

r (s + r)

3r (s + 2)

3s (2 + r)

3rs (r + s)

3 (s + 2)

 $16a^2+8ab-4b^2$  

 $16a^2-8ab-4b^2$  

 $16a^2-8ab+4b^2$ 

 $16a^2+8ab+4b^2$ 

4x² +4x +1

4x² +1

4x² +2x +1

4x² +4x +2

2a²+3b²+12ab

4a²+9b²

4a²+9b²+12ab

4a²+9b²+6ab