# Summary Exercises

### Example 1

Factor 9*x*^{2}*y*^{2} – 24*xy*^{2} + 16*y*^{2} completely or state that it's prime.

### Example 2

Factor 25*x*^{8} – 49*x*^{2} completely or state that it's prime.

### Example 3

Factor *x*^{2} + 4 completely or state that it's prime.

### Example 4

Factor 7*x*^{2} – 20*x* – 3 completely or state that it's prime.

### Example 5

Factor 5*x*^{2} – 35*x* completely or state that it's prime.