Symbol
Problem
Pactorise: 1. (1) 12x +15 (21) 14m - 21 (it) 9n -12n a. (1) 16a' -24ab (i) 15ab -20ab () 12x*y -21x'y S. (1) 24x -36x'y (1) 10x -15x (1) $36x^{3}y-80x^{2}y^{3}2$ 4. (1) Sx - 6x +12x (11) 8x - 72xy +12x () 18a'b -27a b +36a°b 8. (1) 14x +21xy-28x*y (1) -5-10t +20t $a-n\right)+3a-n\right)$ 6. (1) xtx +3)+5(x +3) (31) 5x(x $x-4\right)-7\left(x-4$ (18) 2ml 7. 6ala -26)+5b(a -2b) 8. $x^{3}$ $\left(2a-b\right)+x^{2}\left(2a-b$ 8. $8a\left(3a-5b\right)-12a^{2}\left(3a-5b\right)$ 12. $2a+6b-3\left(a+3b\right)^{2}$ 10. (x +5) - 4(x +5) 11. $3\left(a-2b\right)^{2}-5\left(a-2b\right)$ 15. $12\left(2x-3y\right)^{2}-16\left(3y-2x\right)$ 18. 16(2p-3q1 -4(2p-3q) 14. xla -3) + yl3-a) 16. (x +y)(2x +5) -(x +y)(x +3) 17. ar + br + at + bt 16. x -ax - bx + ab 19. ab* - be - ab +c 20. x - xz +xy -yz 31. 6ab -b +12ac-2be 26. (ax + by) + (bx-ay)* +b?) 22. (x -2y) + 4x - 8y 2283. . y -xy(1 -x)-x 37. ablx +y*)-xyla? 28. ab +la -1)b -1 x -3x +x-3 28. x* - x(a +2b) +2ab uetorles: 1. x-36 2. 4a -9 S. 81 - 49x 4. 4x-9y* 8. 16a* -225b 6. 9a"b? -25 8. 20a - 45b a. x6-3a 6-41x 12b 12. 16x -144x 7. 16a? -144 11. 18. 63a b2 -7 10. 12x 18. 3x - -4287 x 16. - (1-m) 1188. . 1-(b-c)? 17. $3-4p$ $6p$ $\left(2a+3b\right)^{2-16c^{2}}$ $2$ $b\right)$ 18. ((13+x m- ) 4y) - 252 (2x +5y) -1 20. 21. 28. x* -y -2y -1 28. $36c^{2}$ $\left(5a+b\right)^{2}$ $25-\bar{a} 2-b^{2}-2a4$ 36. 25a? -46? + 28bc - 49c 26. 9a" -b + 4b-4 26. 100 -(x -5)² 37. Evaluate ((405)² -(395)"}. 23. Evaluate ((7.8) -(2.2)"}. Pactorie: 2. x+14x + 49 3. 1+2x+x 1. x + 8x +16 8. x +Sax - 9a 6. 4y +20y + 25 4. 9+6z+z 7. 36a + 36a +9 8. SiT +24m +16 9. 2 +2+ 1 $x2121a^{2}-88ab\div 16b$ 10. 49a? $1516x^{2}-24x+9$ $a^{2}+84ab+36b$ 11i6. . $p^{2}-10p+25$ $9y^{2}-12y+4$ $a^{2}b^{2}-6abc+9c$ $19.m^{4}+2m^{2}n^{2}+n$ 18. 1-6x +9x? 16. m2 - 4mn + 4n* 17. im =f +m-2lm). 18. (1+m) -4lm at. Given exp. $1^{2}.m^{2}-2ln-4$ Factorise: 1. x* +5x +6 2 $y^{2}+10y+24$ S. z' +12z +27 4. p +6p +8 8. x +15x +56 6. $y^{2}+19y+60$ 7. x +13x + 40 6. q? -10g +21 9. p° +6p-16 +16 10. x -10x +24 11. x -23x +42 13. x* -17x