Question

Giúp mình với 7h sáng mai nộp rồi

Answer 1

Bài 5: 

a: \(M=\dfrac{x-1}{2}:\dfrac{x^2+2+x^2-1-x^2-x-1}{\left(x-1\right)\left(x^2+x+1\right)}\)

\(=\dfrac{\left(x-1\right)}{2}\cdot\dfrac{\left(x-1\right)\left(x^2+x+1\right)}{x\left(x-1\right)}\)

\(=\dfrac{x^3-1}{2x}\)