Leabhar Iomlán - Cogg

22. (6x 5)(6x 5)23. (1 6x)(1 6x)24. (7a 2b)(7a 2b)25. (xy 1)(xy 1)26. (2ab 4c)(2ab 4c)27. 3(x 3y)(x 3y)28. 5(3 x)(3 x)29. 5(3a 2)(3a 2)30. (2x y 2)(2x y 2)31. (3a 2b 3)(3a 2b 3)32. (a b)(a b)(a 2 b 2 )33. (x 2)( x 7)34. (2x 1)( x 3)35. (2x 7)( x 2)36. (x 2)( x 7)37. (x 4)( x 7)38. (2x 1)(x 3)39. (3x 5)(x 4)40. (7x 4)(x 2)41. (2x 3)(x 5)42. (3x 4)(x 5)43. (4x 5)(3x 1)44. (3x 5)(2x 3)45. (3x 2)(x 5)46. (3x 1)(2x 3)47. (9x 4)(4x 1)48. (5x 2)(3x 4)49. (3y 5)(2y 7)50. (4x y)(3x 5y)51. (i) (x 2 √ __3 )(x √ __3 )(ii) (x 3 √ __5 )(x √ __5 )(iii) (2x √ __2 )(x 3 √ __2 )52. (i) (a b)(a 2 ab b 2 )(ii) (a b)(a 2 ab b 2 )(iii) (2x y)(4x 2 2xy y 2 )53. (i) (3x y)(9x 2 3xy y 2 )(ii) (x 4)(x 2 4x 16)(iii) (2x 3y)(4x 2 6xy 9y 2 )54. (i) (2 3k)(4 6k 9k 2 )(ii) (4 5a)(16 20a 25a 2 )(iii) (3a 4b)(9a 2 12ab 16b 2 )55. (i) (a 2bc)(a 2 2abc 4b 2 c 2 )(ii) 5(x 2y)(x 2 2xy 4y 2 )(iii) (x y z)((x y) 2 z(x y) z 2 )Cleachtadh 1.41. (i)(iv)2. (a)3__y 2 (ii) ___ a2b7 2y ______726x ____15(v)x ______3 2a(b)x ___10(iii) x(c)(e)(g)(i)(k)(m)(o)(q)(s)(u)3. (i)(iii)(v)4. (i)5. (i)(ii)(iii)(iv)______ 2x 912_________ (x 6)617x 11 ________2011x 4 _______201 ___8x5x 14 _____________(x 2)(x 4)17 x ______________(3x 1)(x 3)_________ 13 3x4(3x 5)_______ x 2 y 2(d)(f)(h) 0( j)(l)(n)(p)(r)13x 1 _______203x 5 ______128 ____15x2x 3 ________x(x 3)7x 8 ______________(x 2)(2x 1)13x 13_______________(2x 7)(5x 2)x 7______________(2x 1)(x 2)x 2 y 2 (t) ___________4x 9y 23xyx 7 ________x(x 1)z 2 _____z 5t 4 _____t 2a 8 _____________(a 3)(a 3)4 ________(2x 1)x 4___________________(x 3)(x 3)(x 2)x 5___________________(x 1)(x 1)(x 2)(ii)(iv)(vi)(ii)5______________________(3x 4)(3x 4)(2x 1)1 ___xyy 2 _____y 52 _____________(x 2)(x 2)2x 1 _____________(x 2)(x 2)1 ______2x 16. (i) 5 (ii) 4 (iii) x 17. (i)8. (i)(iii)9. (i)(iii)10. (i)11. (i)1 x _____1 x8y 3 ______43x 2 1 _______2x6z 2 ______6z 36z 2 3 _______6z 2 2x 2 _____x2b _____9 b(ii)(ii)(ii)1 2x ______x(ii)(iv)(ii)(iv)(iii) xy______ 2x 12x______ 4y 128x 2 ______4x 1x 2 x 1 __________x 2 11__x 2 (iii) x 2x 2 ______x 2 312. Cruthúnas (tairiseach = 3)(iii)3y 1 ______3y 1279