Question

сократить дробь 16-4y/16-y^2.
m^2-4mn+4n^2/m^2-4n^2

Answer 1

(16- 4у)  / (16- у^2) =  
= 4(4-y)  /  (4-y)(4+y)=
= 4/(4+y)

(m^2-4mn +4n^2 )  /  (m^2-4n^2) =
 =(m-2n) ^2  / (m-2n)(m+2n)=
= (m-2n)  /  (m+2n)