phan tích

V

vipboycodon

$x^4+3x^2-2x+3$
= $x^4+x+3x^2-3x+3$
= $x(x+1)(x^2-x+1)+3(x^2-x+1)$
= $(x^2-x+1)(x^2+x+3)$
 
D

duchieu300699

$4x^4 -21x^2+1=(2x^2-5x+1)(2x^2+5x+1)$
..............................................................
 
A

anvadinh2018as

x4+3x2−2x+3
= x4+x+3x2−3x+3
= x(x+1)(x2−x+1)+3(x2−x+1)
= (x2−x+1)(x2+x+3)
__________________:D:D:D
 
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