Factorising Quadratics Worksheet
The trick (Anurupyena): x² + bx + c: two numbers that multiply to c and add up to b → (x + one)(x + other). ax² + bx + c: multiply a × c; find two numbers that multiply to that and add up to b; split the middle term with them. Group the four terms in pairs and take out the common bracket. Check by multiplying back.
NameDateTime takenScore ___ / 40
- 1.2x² − 25x + 72 =
- 2.x² + 9x + 14 =
- 3.x² + 8x + 12 =
- 4.x² − 10x + 24 =
- 5.x² − x − 12 =
- 6.x² − 7x + 10 =
- 7.3x² + 4x + 1 =
- 8.x² − 6x − 16 =
- 9.x² + x − 72 =
- 10.x² − 64 =
- 11.2x² − 11x + 5 =
- 12.3x² + 17x − 28 =
- 13.x² + 5x − 24 =
- 14.2x² − 7x − 9 =
- 15.2x² + 5x − 42 =
- 16.2x² + 11x + 15 =
- 17.x² − 8x + 7 =
- 18.x² − x − 6 =
- 19.2x² − 5x − 12 =
- 20.x² − 4x − 5 =
- 21.x² − 3x − 18 =
- 22.x² + 11x + 30 =
- 23.x² + 13x + 36 =
- 24.2x² + 3x − 5 =
- 25.x² − 10x + 21 =
- 26.2x² + 13x + 15 =
- 27.3x² + 8x − 3 =
- 28.x² + 13x + 42 =
- 29.x² + 3x − 28 =
- 30.x² + 11x + 24 =
- 31.3x² + 2x − 5 =
- 32.x² − 7x − 18 =
- 33.3x² − 10x + 3 =
- 34.x² − 5x − 36 =
- 35.3x² + 16x + 5 =
- 36.x² − 8x + 7 =
- 37.x² + 6x − 7 =
- 38.3x² − 2x − 16 =
- 39.x² + 4x − 21 =
- 40.2x² − 23x + 56 =
Answer key
- (2x − 9)(x − 8)
- (x + 7)(x + 2)
- (x + 2)(x + 6)
- (x − 6)(x − 4)
- (x + 3)(x − 4)
- (x − 2)(x − 5)
- (3x + 1)(x + 1)
- (x − 8)(x + 2)
- (x − 8)(x + 9)
- (x − 8)(x + 8)
- (2x − 1)(x − 5)
- (3x − 4)(x + 7)
- (x − 3)(x + 8)
- (2x − 9)(x + 1)
- (2x − 7)(x + 6)
- (2x + 5)(x + 3)
- (x − 7)(x − 1)
- (x − 3)(x + 2)
- (2x + 3)(x − 4)
- (x + 1)(x − 5)
- (x − 6)(x + 3)
- (x + 6)(x + 5)
- (x + 9)(x + 4)
- (2x + 5)(x − 1)
- (x − 3)(x − 7)
- (2x + 3)(x + 5)
- (3x − 1)(x + 3)
- (x + 7)(x + 6)
- (x + 7)(x − 4)
- (x + 3)(x + 8)
- (3x + 5)(x − 1)
- (x − 9)(x + 2)
- (3x − 1)(x − 3)
- (x − 9)(x + 4)
- (3x + 1)(x + 5)
- (x − 1)(x − 7)
- (x − 1)(x + 7)
- (3x − 8)(x + 2)
- (x − 3)(x + 7)
- (2x − 7)(x − 8)
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