Simplify the expression (2x − 9)(x + 6).
( 2x - 9 ) ( x + 6 )( 2x ) ( x ) + ( 2x ) ( 6 ) + ( - 9 ) ( x ) + ( - 9 ) ( 6 )2x² + 12x - 9x - 542x² + 3x - 54.
(2x-9)•(x+6)2x•x+2x•6-9•x-9•62x²+12x-9x-542x²+(12-9)•x -542x²+3x-54