Question

Представьте в виде произведения:
1. 4(x+y)+x^2+xy
2. ap-ag+3p-3g
3. ac^2+bc-b-ac
4. 1-mn-m+n

Answer 1

$4(x+y)+x^2+xy=4(x+y)+x(x+y)=(x+y)(4+x)$
$ap-ag+3p-3g=a(p-g)+3(p-g)=(a+3)(p-g)$
$ac^2+bc-b-ac=ac(c+1)-b(c+1)=(ac-b)(c+1)$
$1-mn-m+n=-m(n+1)+1(n+1)=(-m+1)(n+1)$