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* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
FACTORING Remember the types… 1.Greatest Common Factor (GCF) 2.Difference of Squares 3. Special Trinomials x2+bx+c ax2+bx+c (by decomposition) Example: Example: 3x2y3+12xy4-6x2y = 3xy(xy2+4xy3-2x) x2-9 = (x+3)(x-3) (a conjugate pair!) Example: Example: x2+-4x+21 = (x+3)(x-7) 6x2+11x-10 =6x2+15x-4x-10 factors of -60 that add to give +11? =3x(2x+5)-2(2x-5) regroup/factor =(3x-2)(2x+5) factor Factor the following expressions completely 1. 2. 3. x 2 x 56 x 3 7 x 2 12 x 4x3 9x 11. 12. 13. x 4 3x 3 4 x 2 x 4 81 x 3 y 6 x 2 y 8xy 21. 22. 23. 4 x 3 17 x 2 15 x 6 x 2 13x 2 3x 3 14 x 2 15 x 4. 14. 3x 2 x 14 24. x 2 20 x 75 5. x 4 y 4 x 2 y 8 3x 2 y 5 100 x 2 81 15. 25. x 2 20 x 99 6. 7. 3x 3 7 x 2 2 x x 2 y 7 xy 10 y 16. 17. 5x 5 y 7 10 x 5 y 8 30 x 4 y10 5 x 3 28 x 2 15 x x 2 31x 150 26. 27. 2x 2 6x 8 16 x 4 1 8. 2a 3b 4 c 8a 4 b 4 c 4 10a 2 b 3 c 6 18. 28. x 4 2x 2 8 9. 10. 2 x 3 6 x 2 20 x 25 x 3 16 x 19. 20. x2 y2 2x3 x 2 6x x3 x 29. 30. x 3 x 2 156 x x 2 2 xy y 2 FACTORING Remember the types… 1.Greatest Common Factor (GCF) 2.Difference of Squares 3. Special Trinomials x2+bx+c ax2+bx+c (by decomposition) Example: Example: 3x2y3+12xy4-6x2y = 3xy(xy2+4xy3-2x) x2-9 = (x+3)(x-3) (a conjugate pair!) Example: Example: x2+-4x+21 = (x+3)(x-7) 6x2+11x-10 =6x2+15x-4x-10 factors of -60 that add to give +11? =3x(2x+5)-2(2x-5) regroup/factor =(3x-2)(2x+5) factor Factor the following expressions completely 1. 2. 3. x 2 x 56 x 3 7 x 2 12 x 4x3 9x 11. 12. 13. x 4 3x 3 4 x 2 x 4 81 x 3 y 6 x 2 y 8xy 21. 22. 23. 4 x 3 17 x 2 15 x 6 x 2 13x 2 3x 3 14 x 2 15 x 4. 14. 3x 2 x 14 24. x 2 20 x 75 5. x 4 y 4 x 2 y 8 3x 2 y 5 100 x 2 81 15. 25. x 2 20 x 99 6. 7. 3x 3 7 x 2 2 x x 2 y 7 xy 10 y 16. 17. 5x 5 y 7 10 x 5 y 8 30 x 4 y10 5 x 3 28 x 2 15 x x 2 31x 150 26. 27. 2x 2 6x 8 16 x 4 1 8. 2a 3b 4 c 8a 4 b 4 c 4 10a 2 b 3 c 6 18. 28. x 4 2x 2 8 9. 10. 2 x 3 6 x 2 20 x 25 x 3 16 x 19. 20. x2 y2 2x3 x 2 6x x3 x 29. 30. x 3 x 2 156 x x 2 2 xy y 2 Factor the following expressions completely. ANSWER KEY x 4 3x3 4 x 2 x x 56 2 1. 2. 3. 4. 5. 11. ( x 8)( x 7) x 3 7 x 2 12 x x 4 81 ( x)( x 7 x 12) ( x 9)( x 9) 2 12. 4 x3 9 x x 3 y 6 x 2 y 8 xy ( x)( 4 x 2 9) 13. ( xy)( x 2 6 x 8) ( x)( 4 x 2 17 x 15) ( x)( 4 x 3)( x 5) 22. 6 x 2 13x 2 ( x 2)(6 x 1) 3 x 3 14 x 2 15 x 23. ( x )(3 x 2 14 x 15) ( x)( 2 x 3)( 2 x 3) ( xy)( x 2)( x 4) ( x )( x 3)(3 x 5) x 4 y 4 x 2 y 8 3x 2 y 5 3 x 2 x 14 x 2 20 x 75 14. ( x 2 y 4 )( x 2 y 4 3 y) 100 x 2 81 15. (10 x 9)(10 x 9) 16. 5 x5 y 7 10 x5 y 8 30 x 4 y10 (5 x 4 y 7 )( x 2 xy 6 y 3 ) 24. 25. ( x)(5 x 2 28 x 15) 26. ( x)( x 5)(5 x 3) 17. x 31x 150 2a b c 8a b c 10a b c 4 4 4 2 3 6 (2a b c)( ab 4a bc 5c ) 2 3 5 x y 2 18. 27. 19. ( x )( 2 x 2 x 6) ( x 11)( x 9) 2x2 6x 8 ( x 1)( 2 x 8) (4 x 2 1)( 4 x 2 1) x4 2x2 8 2 ( x y )( x y ) x 2 20 x 99 (4 x 2 1)( 2 x 1)( 2 x 1) 28. ( x 2 4)( x 2 2) ( x 2)( x 2)( x 2 2) 2 x3 x 2 6 x 2 x 3 6 x 2 20 x (2 x)( x 2 3x 10) ( x 25)( x 6) ( x 15)( x 5) 16 x 4 1 2 ( y )( x 2 7 x 10) 2 3 ( x 2)(3x 7) 5 x3 28 x 2 15 x ( x)(3x 2 7 x 2) 3 4 10. 2 ( x 3)( x 3)( x 9) ( y )( x 5)( x 2) 9. 2 ( x)( x 3)( x 4) x 2 y 7 xy 10 y 8. 21. 2 ( x)( x 2)(3x 1) 7. ( x 2 )( x 2 3 x 4) ( x 2 )( x 4)( x 1) 3x 3 7 x 2 2 x 6. 4 x 3 17 x 2 15 x x 3 x 2 156 x 29. ( x )( x 2 x 156) (2 x)( x 5)( x 2) ( x )( 2 x 3)( x 2) ( x )( x 13)( x 12) 25 x3 16 x x3 x x 2 2 xy y 2 ( x)( 25x 2 16) ( x)(5 x 4)(5 x 4) 20. ( x)( x 2 1) ( x)( x 1)( x 1) 30. ( x y )( x y ) ( x y)2