Question

phân tích đa thức thành nhân tử 

4x² + 8xy - 3x - 6y

Answer 1

Ta có 4x²+8xy-3x-6y=4x(x+2y) -3(x+2y)=(x+2y)(4x-3)

Answer 2

4x²+8xy-3x-6y

=(4x²-3x)+(8xy-6y)

=x(4x-3)+2y(4x-3)

=(4x-3)(x+2y)

Answer 3

\(=\left(4x^2+8xy\right)-\left(3x+6y\right)\)
\(=4x.\left(x+2y\right)-3\left(x+2y\right)\)
\(=\left(x+2y\right).\left(4x-3\right)\)

Answer 4

\(4x^2+8xy-3x-6y\)\(=\left(4x^2+8xy\right)-\left(3x+6y\right)\)\(=4x\left(x+2y\right)-3\left(x+2y\right)\)\(=\left(x+2y\right)\left(4x-3\right)\)