화 간: (1) (5ab) / (3c) × (- (12c ^ 2) / (5ab ^ 2) 이 3 c / a, (2) 4 / (x - 1) - x + 1.

화 간: (1) (5ab) / (3c) × (- (12c ^ 2) / (5ab ^ 2) 이 3 c / a, (2) 4 / (x - 1) - x + 1.

(1) (5ab) / (3c) × [- (12c ^ 2) / (5ab ^ 2)] 이것 은 3c / a;
= - (5ab) / (3c) × (12c ^ 2) / (5ab ^ 2) × a / 3c
= - 1 / (3c) × (12c ^ 2) / b × a / 3c
= - 4c / b × a / 3c
= - 4a / (3b)
(2) 4 / (x - 1) - x + 1
= 4 / (x - 1) - (x - 1)
= 4 / (x - 1) - (x - 1) & # 178; / (x - 1)
= [4 - (x - 1) & # 178;] / (x - 1)
= [4 - (x & # 178; - 2x + 1)] / (x - 1)
= [4 - x & # 178; + 2x - 1] / (x - 1)
= (3 - x & # 178; + 2x) / (x - 1)