Question

СРОЧНО АЛГЕБРА!...................

Answer 1

2. а) x/(x+3) x+3≠0 x≠-3

б) (1-y)/(4y-2-2y²)

-2y²+4y-2≠0

Д=16-16=0

x≠-4/-4

x≠1

3. (p+1-1/(1-p)) : (p-p²/(p-1) =

= ((p-p²+1-p-1)/(1-p)) : ((p²-p+p²)/(p-1) =

-p²/(1-p) * (p-1)/(2p²-p) =

-p²(p-1)

=--------------- =

(1-p)(2p²-p)

-p³+p²

=------------------ =

3p²-p-2p³

p(-p²+p)

=-------------- =

p(3p-1-2p²)

-p²+p

=-------------

-2p²+3p-1

-2p²+3p-1≠0

Д=9-8=1

х1≠-3+1/-4≠0,5

х2≠-3-1/-4≠1