1.

\begin { equation } 9(2 x-y)^{2}-(3 x-2 y)^{2} \end { equation }

Answer»

9(2x-y)² - (3x-2y)²(6x-3y)² - ( 3x-2y)²(6x-3y - (3x-2y)) (6x-3y + 3x -2y)( 3x-y)(9x-5y)



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