因式分解 a3b-ab3+a2+b2+1 3x2-11xy+6y2-xz-4yz-2z2 x2-8xy+15y2+2x-4y-3
问题描述:
因式分解 a3b-ab3+a2+b2+1 3x2-11xy+6y2-xz-4yz-2z2 x2-8xy+15y2+2x-4y-3
答
a3b-ab3+a2+b2+1=ab(a+b)(a-b)+a2+b2+1=[a(a-b)][b(a+b)]+a2+b2+1=[a(a-b)+1][b(a+b)+1]=(a²-ab+1)(b²+ab+1)3x2-11xy+6y2-xz-4yz-2z2 =(3x-2y)(x-3y)-xz-4yz-2z2 ==(3x-2y+2z)(x-3y-z)x2-8xy+15y2+2x-4y-3...