Từ \(\frac{a}{b}=\frac{3}{5}\Rightarrow\frac{a}{3}=\frac{b}{5}\)

\(\frac{a}{3}=\frac{b}{5}=\frac{a-b}{3-5}\)

\(\frac{a}{3}=\frac{b}{5}=\frac{4}{-2}\)

\(\Rightarrow\frac{a}{3}=\frac{b}{5}=-2\)

\(a=-2.3=-6\)

\(b=-2.5=-10\)

\(-6.\left(-10\right)+\left|-6+\left(-10\right)\right|=-60+16=-44\)

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