Factorising Quadratics Worksheet

Vedic maths trick 35: Factorising quadratics · Set 68 · 40 sums

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.

1. 1.x² + 9x + 20 =
2. 2.3x² − 16x + 21 =
3. 3.x² + x − 12 =
4. 4.x² − 9x + 14 =
5. 5.2x² − 7x − 49 =
6. 6.x² − 2x − 8 =
7. 7.3x² − 13x + 14 =
8. 8.x² − 11x + 30 =
9. 9.2x² − 21x + 54 =
10. 10.x² − 15x + 54 =
11. 11.x² + 5x + 6 =
12. 12.x² − 2x − 8 =
13. 13.3x² − x − 4 =
14. 14.2x² − 5x + 3 =
15. 15.2x² + 3x − 9 =
16. 16.x² − x − 12 =
17. 17.2x² + 5x − 18 =
18. 18.2x² + 9x + 9 =
19. 19.2x² − 11x − 40 =
20. 20.x² − 9x + 18 =
21. 21.x² − 10x + 24 =
22. 22.x² − 9x + 18 =
23. 23.x² − 17x + 72 =
24. 24.x² + 5x − 14 =
25. 25.x² + 8x − 9 =
26. 26.x² + x − 56 =
27. 27.x² + 3x + 2 =
28. 28.2x² + 15x − 8 =
29. 29.2x² − 23x + 56 =
30. 30.x² + 5x + 6 =
31. 31.x² − 11x + 30 =
32. 32.3x² + 17x − 28 =
33. 33.2x² + 7x − 49 =
34. 34.x² − 7x − 18 =
35. 35.2x² − 5x − 7 =
36. 36.x² − 7x + 12 =
37. 37.x² − 2x − 8 =
38. 38.2x² − 3x − 20 =
39. 39.x² + 12x + 27 =
40. 40.2x² − 5x + 3 =

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