vgtfvbfgyhmkuyl,b

(a^2+c^2-b^2)/(b^2+c^2-a^2)=(2c-b)/b,
(a^2+c^2-b^2)/(b^2+c^2-a^2)=(2c-b)/b, 20
麻烦大家把(a^2+c^2-b^2)/(b^2+c^2-a^2)=(2c-b)/b这个式子化减成bc=b^2+c^2-a^2
(a^2+c^2-b^2)/(b^2+c^2-a^2)=(2c-b)/b
a^2*b+c^2*b-b^3=2c*b^2+2c^3-2a^2*c-b^3-b*c^2+a^2*b
约分bc=b^2+c^2-a^2
a^2*b+c^2*b-b^3=2c*b^2+2c^3-2a^2*c-b^3-b*c^2+a^2*b这一步我早就写到了,关键是怎么约分啊两边相同的减去后得c^2*b=2c*b^2+2c^3-2a^2*c-b*c^2然后怎么做啊!
合并同类项,然后约去c就得到了
的感言:我很笨,谢谢你啊
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