Odpowiedź:
(x^2-ax)^2-(x^2+bx)^2=-x^3-3x^2
x^4-2ax^3+a^2x^2-x^4-2bx^3-b^2x^2=-x^3-3x^2
-2ax^3-2bx^3=-x^3
-2a-2b=-1
-2a=-1+2b
a=(1-2b)/2
a^2x^2-b^2x^2=-3x^2
a^2-b^2=-3
((1-2b)/2)^2-b^2=-3
(1-4b+4b^2)/4-b^2=-3 /*4
1-4b+4b^2-4b^2=-12
1-4b=-12
-4b=-13
b=13/4
a=(1-2*13/4)/2=(1-13/2)/2=-11/2*1/2=-11/4
