Помогите пжлста! 1)2xy-z^2+x^2+y^2. 2) p^2-t^2-2ps+s^2

Question

Помогите пжлста!
1)2xy-z^2+x^2+y^2.
2) p^2-t^2-2ps+s^2

Answer 1

1)2xy-z²+x²+y².=(2xy+x²+y²)-z²=(x+y)²-z²=(x+y-z)(x+y+z)
2) p²-t²-2ps+s²=(p²-2ps+s²)-t²=(p-s)²-t²=(p-s-t)(p-s+t)