Question

разложите на множители x^3+2x^2+x+2
4x-4y+xy-y^2

Answer 1

$x^3+2x^2+x+2=x^2(x+2)+(x+2)=(x + 2)(x^2 + 1)$

$4x-4y+xy-y^2 =4(x-y)+y(x-y)=(x - y)( 4+y)$