Phan tich da thuc thanh nhan tu

T

transformers123

a/ $x^3+3x+4$

$=x^3+x^2-x^2-x+4x+4$

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

b/ $x^3-3x^2+2$

$=x^3-x^2-2x^2+2x-2x+2$

$=(x-1)(x^2-2x-2)$

$=(x-1)[(x-1)^2-3]$

$=(x-1)(x-1-\sqrt{3})(x-1+\sqrt{3})$

c/ $x^4+x^3+x+1$

$=x^3(x+1)+(x+1)$

$=(x+1)(x^3+1)$

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

d/ $a^4+a^3+3a^2+2a+2$

$=a^4+2a^2+a^3+2a+a^2+2$

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