Solve by Factorisation.
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21x²-2x+(1/21)=0
21x²-x-x+(1/21)=0
x(21x-1) -(1/21){21x-1}=0
[x-(1/21)][21x-1]=0
x=1/21
21x²-x-x+(1/21)=0
x(21x-1) -(1/21){21x-1}=0
[x-(1/21)][21x-1]=0
x=1/21
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