@rlopez 

Unfortunately I could not work it either. I do not want to draw a graph. I just want to find the (t, y) points. If I ask, do you give a small example using the commands?

thanks.

@vv 

Unfortunately the isolve command does not work. could you give a small example?

@Kitonum 

For example

> restart:

> P:=product((x-j),j=0..11):

> Q:=a*x^6+b*x^5+c*x^4+d*x^3+e*x^2+f*x+g:

> R:=j*x^4+k*x^3+l*x^2+m*x+n:

> T:=Q^2-R:

> [seq(coeff(T,x^k)=coeff(P,x^k), k=1..11), tcoeff(T,x)=tcoeff(P)];

> solve(%);

why can not maple calculate the coefficients?

Thanks for your answer.

@acer  

Thank you very much for your reply.

I will ask another question.

E:=635732*q^2+4574*q^2*t-324323*q*w+23213*w^2-342*q^2*t+123*q^2*t^3+656*w^2*q+86*q^2*w^2-67657*q*w*t^2+756*w^2*t+6564*q*w^2+767*q^2*w^2*t+4553*q^2*t-909*w^2*t

=(......)q^2+(......)q*w+(.....)w^2+(......)w^2*q+(.....)q^2*w+(....)q^2*w^2+(....)q*w^2    ?????

How can I write?