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100

x2  + 6x + 9 = 0

x=-3 ; x=-3

100

x2 -9x + 18

x=6 ; x=3

100

x2 + 3x + 4 = 14

x=-5 ; x=2

100

6x + 15= 3x + 8 

x=-7/3

100

8(f-2)=0

f=2

200

a2 + 9a + 20 = 0 

a=-5 ; a=-4

200

y2 + 9y + 8 = 0

y=1 ; y=8

200

20x + 5 = 5x + 65

x=4

200

4(3t-2)=88

t=8

200

x2 + 13x = -42

x=-7 ; x=-6

300

3x2 + 33x + 30 = 0

x=-1 ; x=-10

300

x2 + 2x + 25 = 11x + 5

x=5 ; x=4

300

3x2 + 5x + 2

x=-3 ; x=-2

300

20x +5 = 5x + 65

x=4

300

2(5c+2)-2c=3(2c+3)+7

c=6

400

(x-2)(x2 +4x + 3) = 0

x=2 ; x=-3 ; x=-1

400

b2 + 8b + 15 = 0 

b=-5 ; b=-3

400

2(x+5)-7=3(x-2)

x=9

400

9n + 14 = 6n + 29

n=5

400

x2 - 1521

x=-39 ; x= 39

500

9x2 - 5 = 12x - 5

x=0 ; x=4/3

500

2x2 - 5x - 12

x=8 ; x=-3

500

11x - 2 =5 - 2x - 8

x=-1/13

500

(3x-4)(2x+3)=0

x=4/3 ; x=-3/2

500

x2 - 2x - 24

x=6 ; x=-4