Question

phân tích thành nhân tử x^2-y^2-4x-4y

Answer 1

Trả lời :

x² - y² - 4x - 4y

= (x² - y²) - (4x + 4y)

= (x + y) . (x - y) - 4 . (x + y)

= (x + y) . (x - y - 4)

Answer 2

Ta có : x² - y² - 4x - 4y

= x² - y² - 4(x + y) 

= (x - y)(x + y) - 4(x + y)

= (x + y)(x - y - 4)

Answer 3

x² - y² - 4x - 4y 

= ( x² - y² ) - ( 4x + 4y )

= ( x + y )( x - y ) - 4( x + y )

= ( x + y )( x - y - 4 )

Answer 4

\(x^2-y^2-4x-4y\)

\(=(x-y)(x+y)-4(x+y)\)

\(=(x+y)(x-y-4)\)