因式分解:(1)2a 2 b-6ab(2)3x 2 y-3xy-6y(3)3ax+4by+4ay+3bx(4)(x 2 +y 2 )-16x 2 (5)(x-y
因式分解:(1)2a2b-6ab(2)3x2y-3xy-6y(3)3ax+4by+4ay+3bx(4)(x2+y2)-16x2(5)(x-y)(x-y-3)-10....
因式分解:(1)2a 2 b-6ab(2)3x 2 y-3xy-6y(3)3ax+4by+4ay+3bx(4)(x 2 +y 2 )-16x 2 (5)(x-y)(x-y-3)-10.
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(1)2a 2 b-6ab=2ab(a-3); (2)3x 2 y-3xy-6y =3y(x 2 -x-2) =3y(x+1)(x-2); (3)3ax+4by+4ay+3bx =(3ax+3bx)+(4by+4ay) =3x(a+b)+4y(a+b) =(a+b)(3x+4y); (4)(x 2 +y 2 )-16x 2 =(x 2 +4x+y 2 )(x 2 -4x+y 2 ); (5)(x-y)(x-y-3)-10 =(x-y) 2 -3(x-y)-10 =(x-y+2)(x-y-5). |
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