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= ( 6x² + 9x ) + ( 4x + 6 )
= 3x ( 2x + 3 ) + 2( 2x + 3 )
= ( 3x + 2 ) ( 2x + 3 )
2) 12 + 4m - 5m² = 12 - 6m + 10m - 5m²
= ( 12 - 6m ) +( 10m - 5m)²
= ( 2 - m ) 6 + ( 2 - m ) 5m
= ( 2 - m ) (6 + 5m )