Question

  giải giúp mình với

Answer 1

 a;   (\(x^3\) - \(x^2\)y) - (\(x^2\) - y²)

= \(x^2\).(\(x-y\)) - (\(x-y\)).(\(x+y\))

= (\(x-y\)).(\(x^2\) - \(x-y\))

b; 3(\(x-y\)) + ay - a\(x\) 

= 3(\(x-y\)) - a(\(x-y\))

= (\(x-y\))(3 - a) 

Answer 2

a: \(x^3-x^2y-x^2+y^2\)

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

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

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

b: \(3\left(x-y\right)+ay-ax\)

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

=(x-y)(3-a)