Question

сократите дробь : 15-5у/9-у^3 и m^2-4mn+4n^2/m^2-4n^2

Answer 1

(15-5y)/(9-yˇ2)=5(3-y)/(3+y)(3-y)=5/(3+y)
(mˇ2-4mn+4nˇ2)/(mˇ2-4nˇ2)=(m-2n)(m-2n)/(m+2n)(m-2n)=
=(m-2n)/(m+2n)

Answer 2

спасибо)