Question

giai phuong trinh 1/(a+b-x)=1/a+1/b+a/x

 

Answer 1

\(\frac{1}{a-b-x}=\frac{1}{a}+\frac{1}{b}+\frac{1}{x}\)

\(\Leftrightarrow\frac{1}{a-b-x}-\frac{1}{x}=\frac{1}{a}+\frac{1}{b}\)

\(\Leftrightarrow\frac{2x-a-b}{\left(a+b-c\right)x}=\frac{a+b}{ab}\)

\(\Leftrightarrow\left(2x-a-b\right)ab=\left(a+b\right)\left(a+b-c\right)x\)

\(\Leftrightarrow\left(a+b\right)x^2-\left(a^2+b^2\right)x-ab\left(a+b\right)=\)

Answer 2

\(\frac{1}{a-b-x}=\frac{1}{a}+\frac{1}{b}+\frac{1}{x}\)

\(\Leftrightarrow\frac{1}{a-b-x}-\frac{1}{x}=\frac{1}{a}+\frac{1}{b}\)

\(\Leftrightarrow\frac{2x-a-b}{\left(a+b-c\right)}=\frac{a+b}{ab}\)

\(\Leftrightarrow\left(2x-a-b\right)ab=\left(a+b\right)\left(a+b-c\right)x\)

\(\Leftrightarrow\left(a+b\right)x^2-\left(a^2+b^2\right)x-ab\left(a+b\right)=...\)

Answer 3

2 bạn trên lấy c ở đâu ra đấy

Answer 4

không bt cũng chép theo

Answer 5

này Trí, trang khác có đấy

Answer 6

2 bạn trên lm tiếp đc k