C. Factoring by perfect square trinomials
1.
[tex]h ^{2} + 18f + 81[/tex]
2.
[tex]k {}^{2} + 20t + 100[/tex]
D. Factoring general trinomials
1.
[tex]x {}^{2} - 5x - 24[/tex]
2.
[tex]x {}^{2} + 8x - 65[/tex]
3.
[tex]x {}^{2} + 9x + 20[/tex]
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