Question

Phân tích đa thức thành nhân tử : x^2 - y^2 - 5x + 5y

Answer 1

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

Answer 2

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

Answer 3

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

Answer 4

x²-y²-5x+5y=(x²-y²)-(5x-5y)=(x-y)(x+y)-5(x-y)=(x-y)[(x+y)-5]=(x-y)(x+y-5)

Answer 5

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