1) Factorise: x 2 + 12x – 45 a) (x + 3) (x - 15) b) (x – 3) (x + 15) 2) Factorise: 40 + 3x – x 2 a) (x + 8) (x + 5) b) (-x + 8) (x + 5) 3) Factorise: a 2 + 3a – 88 a) (a – 8) (a + 11) b) (a + 8) (a - 11) 4) Factorise: a 2 – 14a – 51 a) (a – 17) (a + 3) b) (a + 17) (a - 3) 5) Factorise: x 2 + 14x + 45 a) (x + 9) (x + 5) b) (x - 9) (x + 5) 6) Factorise: x 2 – 22x + 120 a) (x – 10) (x – 12) b) (x – 10) (x + 12) 7) Factorise: x 2 – 11x – 42 a) (x + 14) (x - 3) b) (x – 14) (x + 3) 8) Factorise: a 2 + 14a + 48 a) (a + 6) (a + 8) b) (a - 6) (a + 8) 9) Factorise: x 2 – 4x – 21 a) (x – 7) (x + 3) b) (x + 7) (x - 3) 10) Factorise: y 2 + 5y – 36 a) (y – 4) (y + 9) b) (y + 4) (y - 9)

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