Question

разложите на множители:

1. ab+ac-a

2.  4x^2-y^2+2x-y

Answer 1

1. a(b+c-1)
2.(4x^2+2x)(-y^2-y)=2x(x+1)-y(y+1)=2x-y(x+1)(x+y)

Answer 2

ab+ac-a=a(b+c-1)

4x^2-y^2+2x-y=(2x-y)(2x+y)+1(2x-y)=(2x-y)(2x+y+1)