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分解因式4x^2-4xy-8y^2-8x+10y+3
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分解因式4x^2-4xy-8y^2-8x+10y+3
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答案和解析
4x" - 4xy - 8y" - 8x + 10y + 3
= 4x” - 4xy + y" - 9y" - 8x + 4y + 6y + 3
= ( 2x - y )" - 9y" - 4( 2x - y ) + 6y + 4 - 1
= ( 2x - y )" - 4( 2x - y ) + 4 - ( 9y” - 6y + 1 )
= ( 2x - y - 2 )” - ( 3y - 1 )"
= ( 2x - y - 2 - 3y + 1 )( 2x - y - 2 + 3y - 1 )
= ( 2x - 4y - 1 )( 2x + 2y - 3 )
= 4x” - 4xy + y" - 9y" - 8x + 4y + 6y + 3
= ( 2x - y )" - 9y" - 4( 2x - y ) + 6y + 4 - 1
= ( 2x - y )" - 4( 2x - y ) + 4 - ( 9y” - 6y + 1 )
= ( 2x - y - 2 )” - ( 3y - 1 )"
= ( 2x - y - 2 - 3y + 1 )( 2x - y - 2 + 3y - 1 )
= ( 2x - 4y - 1 )( 2x + 2y - 3 )
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