# Factoring.?

The work doesn't need to be shown or anything. If you can only do a couple, that's fine too. Thank you!! :]

1. x^2-64

2. x^2-10x+21

3. 6x^2-7x+2

4. y^5+3y^3+4y^2+12

5. 9x^2-16

6. a^2+12a+27

7. 12x^5-6x^3+3x^2

8. 4y^2-17y-15

9. x^2-7x-18

10. x^2-8x+16

11. 49x^2-1

12. y^2+10y+25

13. x^4-81

14. a^2+11a+30

15. 75x^2-30x+3

16. x^2+3x+8x+24

17. x^2-2x-3

18. y^2-6y+5

19. 14x^3-7x^2+21x

20. 49a^2-28a+4

21. a^2-9a+14

22. 8x^3-4x^3+12x^2

23. 9y^2-12y+4

24. 8t^2+2t-3

25. 3t^2-8t-3

26. y^2-22y+121

27. 25t^2-4

28. 9x^2+42x+49

29. 12x^2+4x-5

30. 8x^2-29x-12

I know it's a lot, but I'll take whatever help I can get though. Thanks again!! :] :] :]

### 4 Answers

- Mrs. WicherLv 51 decade agoBest Answer
I'll bet it took longer to type these all out than it would take you to solve them! This was fun, and easy!

1. x^2-64 = (x-8)(x+8)

2. x^2-10x+21 = (x-3)(x-7)

3. 6x^2-7x+2 = (3x-1)(2x-2)

4. y^5+3y^3+4y^2+12 = (y^3+4)(y^2+3)

5. 9x^2-16 = (3x-4)(3x+4)

6. a^2+12a+27 = (a+9)(a+3)

7. 12x^5-6x^3+3x^2 = 3x^2(4x^3-2x+1)

8. 4y^2-17y-15 = (4y+3)(y-5)

9. x^2-7x-18 = (x+2)(x-9)

10. x^2-8x+16 = (x-4)(x-4)

11. 49x^2-1 = (7x-1)(7x+1)

12. y^2+10y+25 = (y+5)(y+5)

13. x^4-81 = (x^2-9)(x^2+9) = (x-3)(x+3)(x^2+9)

14. a^2+11a+30 = (a+5)(a+6)

15. 75x^2-30x+3 = (15x-3)(5x-1)

16. x^2+3x+8x+24 = (x+3)(x+8)

17. x^2-2x-3 = (x+1)(x-3)

18. y^2-6y+5 = (y-1)(y-5)

19. 14x^3-7x^2+21x = 7x(2x^2-x+3)

20. 49a^2-28a+4 = (7a-2)(7a-2)

21. a^2-9a+14 = (a-2)(a-7)

22. 8x^3-4x^3+12x^2 = 4x^2(x+3)

23. 9y^2-12y+4 = (3y-2)(3y-2)

24. 8t^2+2t-3 = (4t+3)(2t-1)

25. 3t^2-8t-3 = (3t+1)(t-3)

26. y^2-22y+121 = (y-11)(y-11)

27. 25t^2-4 = (5t-2)(5t+2)

28. 9x^2+42x+49 = (3x+7)(3x+7)

29. 12x^2+4x-5 = (6x+5)(2x-1)

30. 8x^2-29x-12 = (8x+3)(x-4)

- An ESL LearnerLv 71 decade ago
1)

x^2 - 64

= (x + 8)(x - 8)

2)

x^2 - 10x + 21

= (x - 7)(x - 3)

3)

6x^2 - 7x + 2

= (2x - 1)(3x - 2)

4)

y^5 + 3y^3 + 4y^2 + 12

= (y^2 + 3)(y^3 + 4)

5)

9x^2 - 16

= (3x + 4)(3x - 4)

6)

a^2 + 12a + 27

= (a + 9)(a + 3)

7)

12x^5 - 6x^3 + 3x^2

= 3x^2(4x^3 - 2x + 1)

8)

4y^2 - 17y - 15

= (4y + 3)(y - 5)

9)

x^2 - 7x - 18

= (x + 2)(x - 9)

10)

x^2 - 8x + 16

= (x - 4)(x - 4)

11)

49x^2 - 1

= (7x + 1)(7x - 1)

12)

y^2 + 10y + 25

= (y + 5)(y + 5)

13)

x^4 - 81

= (x^2 + 9)(x^2 - 9)

= (x^2 + 9)(x + 3)(x - 3)

14)

a^2 + 11a + 30

= (a + 6)(a + 5)

15)

75x^2 - 30x + 3

= (15x - 3)(5x - 1)

16)

x^2 + 3x + 8x + 24

= x^2 + 11x + 24

= (x + 8)(x + 3)

17)

x^2 - 2x - 3

= (x + 1)(x - 3)

18)

y^2 - 6y + 5

= (y - 5)(y - 1)

19)

14x^3 - 7x^2 + 21x

= 7x(2x^2 - x + 3)

20)

49a^2 - 28a + 4

= (7a - 2)(7a - 2)

21)

a^2 - 9a + 14

= (a - 7)(a - 2)

22)

8x^3 - 4x^3 + 12x^2

= 4x^3 + 12x^2

= 4x^2(x + 3)

23)

9y^2 - 12y + 4

= (3y - 2)(3y - 2)

24)

8t^2 + 2t - 3

= (4t + 3)(2t - 1)

25)

3t^2 - 8t - 3

= (3t + 1)(t - 3)

26)

y^2 - 22y + 121

= (y - 11)(y - 11)

27)

25t^2 - 4

= (5t + 2)(5t - 2)

28)

9x^2 + 42x + 49

= (3x + 7)(3x + 7)

29)

12x^2 + 4x - 5

= (6x + 5)(2x - 1)

30)

8x^2 - 29x - 12

= (8x + 3)(x - 4)

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