Toán Lớp 8: phân tích đa thức thành nhân tử
a/ ax^2 + 6x b/ x^2 – 4x + 4 -y^2
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 8: phân tích đa thức thành nhân tử
a/ ax^2 + 6x b/ x^2 – 4x + 4 -y^2
Comments ( 2 )
a) x² + 6x
= x . x + x . 6
= x . ( x + 6 )
___________________
b) x² – 4x + 4 – y²
= ( x² – 2 . x . 2 + 4 ) – y²
= ( x – 2 )² – y²
= ( x – 2 + y ) ( x – 2 – y )
a, $ax^{2}+6x=x(ax+6)$
b, $x^{2}-4x+4-y^{2}$
$=(x^{2}-4x+4)-y^{2}$
$= (x-2)^{2}-y^{2}$
$=(x-y-2)(x+y-2)$