Leabhar Iomlán - Cogg

FreagraíCaibidil 1: Ailgéabar 126. (i) x 2 2x 4 (ii) 4x 2 6xy 9y 2 21. (4x 5y)(4x 5y)Cleachtadh 1.2Cleachtadh 1.11. (i) 3 (ii) 9 (iii) 52. (i) 2 (ii) 3 (iii) 43. (i) Ní slánuimhir í 3 2 .(ii) -4x -1 , ní cumhacht dhearfach í -14. (i) 8x 2 4x 2 (ii) 4x 3 2x 2 6x(iii) 7x 2 5x (iv) 9x 2 9x 195. (i) 22x 3 19x 2 (ii) 9x 4 26x 3(d) ___ a 2(iii) 7x 4 5x 3 5x 2 (iv) 15x 3 31x 2 3x16 ___ 3a4 66. (i) 2x 2 13x 20 (ii) 2x 2 x 6(iii) 3x 2 7x 6 (iv) 12x 2 11x 2(v) 6x 2 13x 5 (vi) 8x 2 22x 6(vii) x 2 4 (viii) 4x 2 25(ix) a 2 x 2 b 2 y 27. (i) x 2 4x 4 (ii) x 2 6x 9(iii) x 2 10x 25 (iv) a 2 2ab b 2(v) x 2 2xy y 2 (vi) a 2 4ab 4b 2(iii) t 2 7t 16 (2)(vii) 9x 2 6xy y 2 (viii) x 2 10xy 25y 2(ix) 4x 2 12xy 9y 211. (i) 1372 cm 3 (ii)8. (i) x 2 x 1_4 (ii) 12. 36, 28, 4x 78x2 4x 1_2(iii) x 2 2x 113. ___ 40 2 m9. (i), (ii) Ní slánchearnóg í (iii) Is slánchearnóg í.Ní féidir codanna (i) agus (ii) a shloinneadh sanfhoirm (ax b) 210. p 4 11. t 20 12. s 16Cleachtadh 1.313. (i) x 3 4x 2 10x 12(ii) 2x 3 5x 2 1. 5x(x 2) 13x 4(iii) 2x 3 3x 2 2. 6b(a 2c) 5x 6(iv) 6x 3 16x 2 3. 3x(x 2y) 14x 44. 2x 2 (y 3z)14. Cruthúnas5. 2a(a 2 2a 4)15. Cruthúnas6. 5xy(y 4x)16. 147. 2ab(a 2b 6c)17. 2x 3 x 2 25x 128. 3xy(x 3y 5z)18. 2x 4 10x 3 9x 2 5x 29. 2r(2r 3h)19. 4710. (3a 4)(2b c)20. (i) x 2 (ii) x 211. (x 9)(x 3)(iii) x 2 2x(iv) 3x 2y12. (c 2d)(2c 1)21. (i) 2x 3y 1 (ii) 2x 2 3x 413. (2x y)(4a 3b)22. (i) 4a (ii) 4ab (iii) 2yz (iv)y__14. (y 3b)(7y 2a)x23. (i) x 3 (ii) 2x 4 (iii) 2x 3 15. (2x 3y)(3y 4z)24. (i) x 2 7x 12 (ii) x 2 116. (2x 3y)(3x 2a)(iii) x 2 1 (iv) 4x 2 5x 617. (x y)(x y)(3a 4b)(v) x 2 5x 3 (vi) 2x 2 3x 618. (a b)(a b)25. (i) x 2 (ii) x 319. (x 2y)(x 2y)(iii) 3x 1 (iv) x 220. (3x y)(3x y)2781. (i) x 2 4x (ii) 4x 82. (i) 2x 2 (ii) 10x 23. (a) 2x 3 5x 2 3x(b) 8x 2 15x 6(c) (i) 390 cm 3 (ii) 281 cm 24. (a) 4 (b) 8 (c) 14(d) 54a 3 9a 2 15a 45. (a) 6 (b) 46 (c) 7.756. (a) 2x 2 xy 3y 2 (b) 6x 4y7. (a) 2x 3 10x 2 (b) 18x 2 50x8. (i) Líon na dtrasnán i bpolagán a bhfuil 4 shlios air (2)(ii) Líon na dtrasnán i bpolagán a bhfuil 5 shlios air (2),(5), (9)Níl aon trasnán i dtriantán9. a 2 3a 810. (i) 4t 2 6t 6 (2) (ii) t 4 3t 2 6 (4)1_3 r3 (iii)14. 3 m15. (i) 10 (ii) 15 (iii) 45; 174_3 h3