Algebra - Factorisation - Cross method (monics).
Test Yourself 1.
Factorise each of the following expressions using the cross-method:
| Format | ||
| Both signs positive. | 1. x2 + 3x + 2 | 2. x2 + 11x + 18 |
| 3. t2 + 9t + 18 | 4. m2 + 16m + 55 | |
| Signs are negative then positive respectively. | 5. x2 - 11x + 18 | 6. y2 - 39y + 38 |
| 7. f2 - 27f + 50 | 8. n2 - 8n + 15 | |
| Signs are positive then negative respectively. | 9. x2 + 5x - 36 | 10. k2 + 9k - 70 |
| 11. d2 + d - 42 | 12. g2 + 9g -22 | |
| Signs are both negative. | 13. x2 - 5x - 24 | 14. w2 - 2w - 63 |
| 15. z2 - 8z - 48 | 16. p2 - 15p - 54g | |
| Randoms. | 17. a2 + 17a + 52 | 18. j2 - 8j - 65 |
| 19. q2 - 13q + 30 | 20. g2 + 21g - 72 |