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log(22-2x2/25-10x+x2)=0
10°=22-2x2/25-10x+x2
1=22-2x2/25-10x+x2
25-10x+x2=22-2x2
3x2-10x+3=0
(x-3)(3x-1)=0
CS=(3,1/3)