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-7x(x-6)=0
x=0 v x-6=0
x=0 v x=6
9x²+1/3x=0
1/3x(27x+1)=0
x=0 v 27x+1=0
x=0 v x=-1/27
36x²-6x=0
6x(6x-1)=0
x=0 v 6x-1=0
x=0 v x=1/6
2x+18x²=0
2x(9x+1)=0
x=0 v 9x+1=0
x=0 v x=-1/9
-7x (x-6) = 0
x = 0 v x - 6 =0
x = 0 v x = 6
b) 9x^2 + 1/3x = 0
1/3x (27x+1) = 0
x= 0 v 27x + 1 = 0
x= 0 v x= -1/27
c) 36x^2 - 6x = 0
6x (6x-1) = 0
x = 0 v 6x - 1 = 0
x = 0 v x = 1/6
d) 2x + 18x^2= 0
2x (9x+1) = 0
x = 0 v 9x + 1 = 0
x = 0 v x = -1/9