[Toán 8]Phân tích đa thức thành nhân tử?

H

hocgioi2013

1)=$(x+y)^2-2(x+y)+1^2-(2m)^2$
=$(x+y-1)^2-(2m)^2$
=$(x+y-1-2m)(x+y-1+2m)$

bấm cảm ơn nha@@@@@@@@@
 
Last edited by a moderator:
V

vipboycodon

a. $x^2+y^2-2x-2y+2xy+1-4m^2$
= $(x^2+2xy+y^2)-2(x+y)+1-4m^2$
= $(x+y)^2-2(x+y)+1-4m^2$
= $(x+y-1)^2-4m^2$
= $(x+y-1+2m)(x+y-1-2m)$
 
C

chonhoi110

2. $4x^4+1-x(2x^2-2x+1)$
$=4x^4+4x^2+1-4x^2-x(2x^2-2x+1)$
$=(2x^2+1)^2-4x^2-x(2x^2-2x+1)$
$=(2x^2-2x+1)(2x^2+2x+1)-x(2x^2-2x+1)$
$=(2x^2-2x+1)(2x^2+x+1)$
 
You must log in or register to reply here.
Top Bottom