Odpowiedzi

2009-12-20T16:17:30+01:00
1)
(7b-5a)(x+y)+(x-y)(7b-5a)=
=(7b-5a)(x+y)( x-y)
2)
x²(10a-1)-x(10a-1)=
=(10a-1)*(x² -x) =
= x*(10a-1)*(x -1)
3)
x²(4-x)-x(x-4)+(4-x)=
=x²(4-x)+x(4 -x)+(4-x)=
= ( 4 -x)*(x² + x + 1)

4)
(2x-1)y+(1-2x)-z(1-2x) =
= -y(1 -2x)+(1-2x)-z(1-2x)=
= (1-2x) *( 1-y -z)
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