Question

tìm x biết \(\frac{x+1}{2}\)= \(\frac{8}{x+1}\)

Answer 1

\(\frac{x+1}{2}=\frac{8}{x+1}\Rightarrow\left(x+1\right)\left(x+1\right)=2.8\Rightarrow\left(x+1\right)^2=16\)

=>x+1=4 hoặc -4

=>x=3 hoặc -5

vậy x=-5;3

Answer 2

nguyen thieu cong thanh làm đúng rùi.