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Please help me with this problem

Please help me with this problem-example-1
User LemurPwned
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1 Answer

20 votes
20 votes

\begin{gathered} (c^2-d^2)/(d^2+cd-2c^2) \\ (\left(c+d\right)\left(c-d\right))/(d^2+cd-2c^2) \\ (\left(c+d\right)\left(c-d\right))/(\left(2c+d\right)\left(-c+d\right)) \\ -(c+d)/(2c+d) \end{gathered}

answer:


(-c-d)/(d+2c)

the third one

User Vmeln
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