因式分解_____)a(_____)(_24-ma2a8-am2______)y9xy6-x______)(______)(_y4-x2_____)a3ab12a3-12-x2x4-x222222222如:分到底而最难的还是分解就要,三项就试完全平方。用公式。两项试平方差式,若没有公因式再看首先有因式就提取公因怎样选用与分解要求(完全平方公式法:如平方差公式法:如公式法:(提取公因式法:如因式分解方法:因式分解定义:式中任选两式作差分解因题在2229,1,,417byxa2222229823-992325528255312-255323315716-158182542542516258116补题用简便方法计算值,求,题)则(若题22222abba2ba2ab32ba15______2n2m-n-m1-n-m13xyxxxmmxxxx22222524532421840题页练习聚焦2222431219xxyx题聚焦22229695644yxxxaabbbaxyyx4443205211022222题:xxmmyxyxxxy3648827645332442227183536341439621211122222xxaaxxxxxx题312310449882848472426222322xxaababaaaxxaaxyxyxyyxyxaa36334422111223224题