Làm tính nhân phân thức: b) x^2-x/ 2x+1. 4x^2-1/ x^3-1 .
Giải thích
b, x2−x2x+1.4x2−1x3−1=(x2−x)(4x2−1)(2x+1)(x3−1)
=x(x−1)(2x+1)(2x−1)(2x+1)(x−1)(x2+x+1)=x(2x−1)x2+x+1
b, x2−x2x+1.4x2−1x3−1=(x2−x)(4x2−1)(2x+1)(x3−1)
=x(x−1)(2x+1)(2x−1)(2x+1)(x−1)(x2+x+1)=x(2x−1)x2+x+1