Question

25(a-2b)^2+4(2b-a)因式分解

Answer 1

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 )"