Question

giúp mình 3 câu này với pls

1) 3x²y - 5y - 3xy² + 5x

2) ax + by + ay + bx

3) x(x - 2y) - x + 2y 

Answer 1

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

2) \(=\left(ax+ay\right)+\left(bx+by\right)=a\left(x+y\right)+b\left(x+y\right)=\left(x+y\right)\left(a+b\right)\)

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

Answer 2

1) \(3x^2y-5y-3xy^2+5x\)

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

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

2) \(ax+by+ay+bx\)

\(=a\left(x+y\right)+b\left(x+y\right)\)

\(=\left(a+b\right)\left(x+y\right)\)

3) \(x\left(x-2y\right)-x+2y\)

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

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