Phân tích

T

thienbinhgirl

$x^2−x−2001.2002$
$=x^2−x−2001.(2001+1)$
$=x^2−x–2001^2−2001$
$=(x^2–2001^2)–(x+2001)$
$=(x+2001)(x–2002)$
 
Last edited by a moderator:
Top Bottom