Question

Разложите на множители: х(y-z)^2+(z-y)^2 4(m+n)+(m+n)

Answer 1

$x(y-z)^2+(z-y)^2=[\, (a-b)^2=(b-a)^2=a^2+b^2-2ab\, ]=\\\\=x(y-z)^2+(y-z)^2=(y-z)^2\cdot (x+1)\\\\\\4(m+n)+(m+n)=(m+n)\cdot (4+1)=5\cdot (m+n)$