(3a²+2a-8)²-(a²-2a-8)² 因式分解 数学题
问题描述：
(3a²+2a-8)²-(a²-2a-8)² 因式分解 数学题
要有过程. 快~
答
( 3a" + 2a - 8 )" - ( a" - 2a - 8 )"= [ ( 3a" + 2a - 8 ) + ( a" - 2a - 8 ) ][ ( 3a" + 2a - 8 ) - ( a" - 2a - 8 ) ]= ( 3a" + 2a - 8 + a" - 2a - 8 )( 3a" + 2a - 8 - a" + 2a + 8 )= ( 4a" - 16 )( 2a" + 4a...