C. Factoring by perfect square trinomials

1.h ^{2} + 18f + 81h2+18f+81

2.k {}^{2} + 20t + 100k2+20t+100

D. Factoring general trinomials

1.x {}^{2} - 5x - 24x2−5x−24

2.x {}^{2} + 8x - 65x2+8x−65

3.x {}^{2} + 9x + 20x2+9x+20

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