Найдите значения дроби

Question

Найдите значения дроби

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Answer 1

(9c²-4b²)/(18c²-12bc)=(3c-2b)*(3c+2b)/(6c*(3c-2b))=(3c+2b)/6c=
(3*(2/3)+2*0,5)/(6*(2/3))=(2+1)/(12/3)=3/4.