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25(a-2b)^2+4(2b-a)因式分解

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25(a-2b)^2+4(2b-a)因式分解
(9a^2+2b^2)(7a-8b)^2-(2a^2+9b^2)(8b-7a)^2
25(a-2b)^2+4(2b-a)因式分解
25(a - 2b)" + 4(2b - a)
= 25( a - 2b )" - 4( a - 2b )
= ( a - 2b )( 25a - 50b ) - 4( a - 2b )
= ( a - 2b )( 25a - 50b - 4 )
(9a" + 2b")(7a - 8b)" - (2a" + 9b")(8b - 7a)"
= ( 9a" + 2b" )( 7a - 8b )" - ( 2a" + 9b" )( 7a - 8b )"
= ( 9a" + 2b" - 2a" - 9b" )( 7a - 8b )"
= ( 7a" - 7b" )( 7a - 8b )"
= 7( a" - b" )( 7a - 8b )"
= 7( a - b )( a + b )( 7a - 8b )"