1) a^2b^4 - a^4b^2 / 5*a^2b+ab^2

1) а^2b^4 - a^4b^2 = ( ab^2 )^2 - ( a^2b )^2 = ( ab^2 + a^2b )•( ab^2 - a^2b ) 2) ( ( ab^2 + a^2b )•( ab^2 - a^2b ) ) / ( 5•( a^2b + ab^2 )) = ( ab^2 - a^2b ) / 5 = 0,2•( ab^2 - a^2b )

1) а^2b^4 - a^4b^2 = ( ab^2 )^2 - ( a^2b )^2 = ( ab^2 + a^2b )*( ab^2 - a^2b ) 2) ( ( ab^2 + a^2b )*( ab^2 - a^2b ) ) / ( 5*( a^2b + ab^2 )) = ( ab^2 - a^2b ) / 5 = 0,2*( ab^2 - a^2b )