1.

\left. \begin{array} { l } { ( x ^ { 2 } y ) ^ { 3 } = x ^ { 2 } y ^ { 3 } = x ^ { 8 } y ^ { 3 } } \\ { ( 5 x + 3 y ) ^ { 2 } = 25 x ^ { 2 } + 9 y ^ { 2 } } \end{array} \right.

Answer»

(x^2y)^3=x^2*3y^3=x^6y^3(5x+3y)^2=25x^2+30xy+9y^2



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