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
- 1.3x² + 14x − 24 =
- 2.3x² − 31x + 70 =
- 3.x² − 2x − 63 =
- 4.x² + 4x + 3 =
- 5.x² − 16x + 63 =
- 6.3x² − 23x + 14 =
- 7.2x² − 19x + 24 =
- 8.x² − 5x + 6 =
- 9.x² + 9x + 8 =
- 10.x² − 7x − 8 =
- 11.x² + x − 20 =
- 12.3x² − 4x − 32 =
- 13.2x² + 9x + 7 =
- 14.2x² + 13x + 21 =
- 15.x² + x − 6 =
- 16.x² − 12x + 32 =
- 17.x² + 9x + 20 =
- 18.x² − 7x + 12 =
- 19.x² − 15x + 54 =
- 20.x² + 2x − 15 =
- 21.3x² − 13x + 4 =
- 22.2x² + 7x + 3 =
- 23.x² − 9 =
- 24.x² + 5x + 4 =
- 25.x² + 2x − 15 =
- 26.x² + 17x + 72 =
- 27.3x² + 35x + 72 =
- 28.x² − 12x + 32 =
- 29.x² − 7x + 12 =
- 30.3x² + 5x − 28 =
- 31.3x² + 14x − 24 =
- 32.x² − 5x − 36 =
- 33.x² + 9x + 18 =
- 34.x² + 4x − 12 =
- 35.x² − 14x + 48 =
- 36.2x² − x − 10 =
- 37.x² − 3x − 40 =
- 38.x² + 4x − 12 =
- 39.x² + 8x + 7 =
- 40.x² − 15x + 56 =
Answer key
- (3x − 4)(x + 6)
- (3x − 10)(x − 7)
- (x − 9)(x + 7)
- (x + 1)(x + 3)
- (x − 7)(x − 9)
- (3x − 2)(x − 7)
- (2x − 3)(x − 8)
- (x − 3)(x − 2)
- (x + 8)(x + 1)
- (x + 1)(x − 8)
- (x − 4)(x + 5)
- (3x + 8)(x − 4)
- (2x + 7)(x + 1)
- (2x + 7)(x + 3)
- (x − 2)(x + 3)
- (x − 8)(x − 4)
- (x + 5)(x + 4)
- (x − 3)(x − 4)
- (x − 9)(x − 6)
- (x − 3)(x + 5)
- (3x − 1)(x − 4)
- (2x + 1)(x + 3)
- (x − 3)(x + 3)
- (x + 1)(x + 4)
- (x − 3)(x + 5)
- (x + 8)(x + 9)
- (3x + 8)(x + 9)
- (x − 8)(x − 4)
- (x − 4)(x − 3)
- (3x − 7)(x + 4)
- (3x − 4)(x + 6)
- (x − 9)(x + 4)
- (x + 6)(x + 3)
- (x + 6)(x − 2)
- (x − 8)(x − 6)
- (2x − 5)(x + 2)
- (x − 8)(x + 5)
- (x − 2)(x + 6)
- (x + 7)(x + 1)
- (x − 8)(x − 7)
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