你可能感兴趣的试题
4x与4 y 4y与4xy 4xy2与4x2y 4xy2与4y2x
12abc-9a2b2=3abc(4-3ab) 3x2y-3xy+6y=3y(x2-x+2y) -a2+ab-ac=-a(a-b+c) x2y+5xy-y=y(x2+5x)
xy(2x-2y)2 2xy(x-y)2 4xy(x2-2xy+y2) 4xy(x-y)2
3a(a-b)-5b(a-b)=(a-b)(3a-5b) 4x2-y2=(2x-y)(2x+y) -4x2+12xy-9y2=-(2x-3y)2 x4-8x2y2+16y4=(x2-4y2)2
(x-5y+1)(x-5y-8) (x-5y+4)(x-5y-2) (x-5y-4)(x-5y-2) (x-5y-4)(x-5y+2)
x2 –2xy+y2=x(x-2y)+y2 x2-16y2=(x+8y)(x-8y)
x2+xy+y2=(x+y)2 x4y4-1=(x2y2+1)(xy+1)(xy-1)
-x2-y2 = -(x+y)(x-y) x2y+2xy+4y = y(x+2)2 -49x2+x2y2 = (xy+7x)(xy-7x) 16x2+4y2-16xy = 4(2x-y)2
12abc-9a2b2=3abc(4-3ab) 3x2y-3xy+6y=3y(x2-x+2y) -a2+ab-ac=-a(a-b+c) x2y+5xy-y=y(x2+5x)