Từ \(6a^2+ab=35b^2\)\(\Rightarrow6a^2+ab-35b^2=0\)
\(\Rightarrow6a^2+15ab-14ab-35b^2=0\)
\(\Rightarrow3a\left(2a+5b\right)-7b\left(2a+5b\right)=0\)
\(\Rightarrow\left(3a-7b\right)\left(2a+5b\right)=0\)
\(\Rightarrow\orbr{\begin{cases}3a=7b\\2a=-5b\end{cases}}\)\(\Rightarrow\orbr{\begin{cases}a=\frac{7b}{3}\\a=-\frac{5b}{2}\end{cases}}\)
Thay vao tinh....