共50条信息
\((2) \dfrac{{a}^{2}−4}{{a}^{2}−2a+1}⋅ \dfrac{{a}^{2}−1}{{a}^{2}+4a+4} \)
计算\(\dfrac{{a}^{2}-1}{{a}^{2}+2a+1}÷ \dfrac{a−1}{a} \)的结果是\((\) \()\)
下列运算正确的是( )
化简:\(\dfrac{m-1}{m}\div \dfrac{1-m}{{{m}^{2}}}=\)__________.
\((1)(- \dfrac{3a}{b}{)}^{2}· \dfrac{{b}^{2}}{3{a}^{2}} \); \((2)\dfrac{x}{{{x}^{2}}-1}\cdot \dfrac{{{x}^{2}}+x}{{{x}^{{}}}}.\)
化简:\(\dfrac{{{a}^{2}}-{{b}^{2}}}{{{a}^{2}}+2ab+{{b}^{2}}}\div \dfrac{2a-2b}{a+b}==\) ;
进入组卷