Fill in the blank of the given equation. Write your answers on your answer sheet.
1.a² + 12a + 11 = (a +_ _)(a + 11)
2.b2 + 6b+8 = (b + 2)(b + -)
3.c2 - 7c+ 6 = (-__)(0-1)
4. 2x2 - 3x - 9 = (x+3)(x - 3)
5. 3x2 + 5x - 2 = (x - 1)(x + 2)​