* daca $P{~1~}$ sau $P{~2~}$ sunt egale cu {@-1@} nu se va mai afisa decat semnul $-$
* daca $Q{~1~}$ sau $Q{~2~}$ sunt mai mici decat $0$ se va afisa semnul $-$ in loc de semnul $+$

Daca nu exista $K$ posibilitati de a scrie ecuatia data se va afisa in schimb valoarea {@-1@}.

h2. Restrictii
* $-10^9^ ≤ A, B, C ≤ 10^9^$

* $A, C ≠ 0$
* $1 ≤ K ≤ 10^9^$

* $A, B, C &neq; 0$

h2. Exemplu
table(example). |_. ecuatie.in |_. ecuatie.out |

| 4 8 -12 9
| (2x-2)(2x+6) |

| This is some
  text written on
  multiple lines.
| This is another
  text written on
  multiple lines.
|

h3. Explicatie

Toate posibilitatile de a rescrie $4x^2^+8x-12$ sunt:
 
# @(-4x-12)(-x+1)@
# @(-4x+4)(-x-3)@
# @(-2x-6)(-2x+2)@
# @(-2x+2)(-2x-6)@
# @(-x-3)(-4x+4)@
# @(-x+1)(-4x-12)@
# @(x-1)(4x+12)@
# @(x+3)(4x-4)@
# *{@(2x-2)(2x+6)@}*
# @(2x+6)(2x-2)@
# @(4x-4)(x+3)@
# @(4x+12)(x-1)@

...

== include(page="template/taskfooter" task_id="ecuatie") ==

2409