Question

Phân tích đa thức thành nhân tử

4x^2-y^2+4x+4y-3

giúp mk vs nhé mn.

Answer 1

Ta có: 4x² - y² + 4x + 4y - 3

= (4x² - 4x + 1) - (y² - 4y + 4)

= (2x - 1)² - (y - 2)²

= (2x - 1 -y + 2)(2x - 1 + y - 2)

= (2x - y + 1)(2x + y - 3)

Answer 2

\(4x^2-y^2+4x+4y-3\)

\(=\left(4x^2+4x+1\right)-\left(y^2-4y+4\right)\)

\(=\left(2x+1\right)^2-\left(y-2\right)^2\)

\(=\left(2x+1+y-2\right)\left(2x+1-y+2\right)\)

\(=\left(2x+y-1\right)\left(2x-y+3\right)\)

Answer 3

Ta có : 4x² - y² + 4x + 4y - 3

         = 4x² - y² + 4x + 4y + 1 - 4 

        = ( 4x² + 4x + 1 ) - ( y² - 4y + 4 )

       = ( 2x + 1 )² - ( y - 2 )²

      = ( 2x + 1 - y + 2 )( 2x + 1 + y - 2 )

     = ( 2x - y + 3 )( 2x + y - 1 )

Answer 4

\(4x^2-y^2+4x+4y-3\)

\(=\left(4x^2+4x+1\right)-\left(y^2-4y+4\right)\)( tách -3 = 1 - 4 ) 

\(=\left(2x+1\right)^2-\left(y-2\right)^2\)

\(=\left(2x+1+y-2\right)\left(2x+1-y+2\right)\)

\(=\left(2x+y-1\right)\left(2x-y+3\right)\)