Сократите дробь а) -у^5/у^4 б) у(х+2)(у-3)/х^2(х+2)у^2

Question

Сократите дробь а) -у^5/у^4 б) у(х+2)(у-3)/х^2(х+2)у^2

Answer 1

 а) -у^5/у^4=
=-y^5-4=
-y^1
=-y
б) у(х+2)(у-3)/х^2(х+2)у^2=
=y*(x+2)^2*(y-3) * y^2/x^2
=
y^3(x+2)^2*y-y^3*(x+2)^2*3/x^2
y^4(x^2+4x+4)-3y^3*(x^2+4x+4)/x^2=
=x^2y^4+4xy^4+4y^4-3x^2*y^3-12xy^3-12y^3/x^2