Question

phân tích đa thức sau thành nhân tử: 

3x^2 + 5y - 3xy - 5x

Answer 1

\(=\left(3x^2-3xy\right)+\left(5y-5x\right)\)

\(=3x\left(x-y\right)+5\left(y-x\right)\)

\(=3x\left(x-y\right)-5\left(x-y\right)\)

\(=\left(3x-5\right)\left(x-y\right)\)

Answer 2

Ta có: 

\(3x^2+5y-3xy-5x\)

\(=\left(3x^2-3xy\right)+\left(5y-5x\right)\)

\(=3x\left(x-y\right)-5\left(x-y\right)\)

\(=\left(3x-5\right)\left(x-y\right)\)

Answer 3

\(3x^2+5y-3xy+5x\)

\(=\)\(\left(3x^2-3xy\right)+\left(5y-5x\right)\)

\(=\)\(3x\left(x-y\right)-5\left(x-y\right)\)

\(=\left(3x-5\right)\left(x-y\right)\)

Answer 4

Phân tích đa thức 

3x^2+5y-3xy-5x