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D
100

3x^2+10x+8

(3x+4)(x+2)

100

5x^2+30x+45

5(x-3)(x-3)

100

4x^2-12x-160

4(x-8)(x+5)

100

-3x^2-21x+90

-3(x-3)(x+10)

200

x^2-36

(x-6)(x+6)

200

9x^2-12x+4

(3x-2)(3x-2)

200

6x^2+17x-14

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

200

4x^2-2x-12

2(2x+3)(x-2)

300

81x^8-1

(9x^4-1)(9x^4+1)

300

-2x^2+30x-52

-2(x-13)(x-2)

300

7x-56

7(x-8)

300

16x^2-24x+9

(4x-3)(4x-3)

400

x^2-4

(x-2)(x+2)

400

16x^2-49

(4x-7)(4x+7)

400

6a^2+27

3(2a^2+9)

400

14gh-18

2(7gh-9)

500

16bc+24

8(2bc+3)

500

4y-24

4(y-6)

500

18ab-48

6(3ab-8)

500

18xz-36

9(2xz-4)