Question

M = x - x mũ 2 phần 1 - x mũ 2 + 1 phần 1 +x . 3x - 1 phần x + 1 - 1

Answer 1

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

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

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

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

Answer 2

đề yêu cầu gì vậy bạn