Разложите ** множители; 1) x+xy-xz; 2) x2-9y2+x-3y.

Question

Разложите на множители;
1) x+xy-xz;
2) x2-9y2+x-3y.

Answer 1

1) x+xy-xz=x*(1+y-z);
2) x2-9y2+x-3y=3x-21y=3*(x-7y).