Factors then Solve!

Solve the following equations by factoring. Answer the quesstions that follow.

1.)
[tex] {t}^{2} + 8t \: + 16 = [/tex]
2.)
[tex] {x}^{2} - x - 6 = 0[/tex]
3.)
[tex] {x}^{2} - 5x = 14[/tex]
4.)
[tex]4 {x}^{2} - 81 = 0[/tex]
5.)
[tex] {h}^{2} + 6h - 16 = 0[/tex]
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