Question

\(\frac{y^2-12}{6y-36}+\frac{6}{y^2-6y}\)

cộng hai phân thức khác mẫu nha

Answer 1

\(\frac{y^2-12}{6y-36}+\frac{6}{y^2-6y}=\frac{y^2-12}{6\left(y-6\right)}+\frac{6}{y\left(y-6\right)}\)\(=\frac{\left(y^2-12\right)y}{6y\left(y-6\right)}+\frac{36}{6y\left(y-6\right)}\)

\(=\frac{y^3-12y+36}{6y\left(y-6\right)}\)

 

Answer 2

nếu mk ko nhầm thì \(y-12\) chứ sao y^2-12

Answer 3

\(\frac{y^2-12}{6y-36}+\frac{6}{y^2-6y}=\frac{y^2-12}{6\left(y-6\right)}+\frac{6}{y\left(y-6\right)}=\frac{y^3-12y}{6y\left(y-6\right)}+\frac{36}{6y\left(y-6\right)}=\frac{y^3-12y+36}{6y\left(y-6\right)}\)