Ta có : A= \(\left(\frac{3}{5}xy^2\right)^2\). \(\left(\frac{20}{27}x^3y\right)\)
A= \(\left(\frac{3}{5}\right)^2.x^2.\left(y^2\right)^2.\frac{20}{27}x^3y\)
A = \(\left(\frac{9}{25}.\frac{20}{27}\right).\left(x^2.x^3\right).\left(y^4.y\right)\)
A = \(\frac{4}{5}x^5y^5\)
Vậy .....
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