Разложите на множители. 5.88

1)   ..........=(a+b)(a-ab+b) -2ab(a+b)=(a+b)( -ab-2ab)= -3ab(a+b)

2)   ..........=(m-n)(m+mn+n)-6m(m+mn+n)=(m+mn+n)(m-n-6m)=(m+mn+n)(-5m-n)

3)    ........=(x-y)(x+xy+y)+8xy(x-y)=(x-y)(x+xy+y+8xy)=(x-y)(x+9xy+y)

4)   ......=(p+q)(p-pq+q) -2pq(p-pq+q)=(p-pq+q)(p+q-2pq)