can I multiply the denominator to make it disappear?

f1=(- 11*c1^2 + 2043*c1*c3 + 11*c2^2 - 2043*c2 + 11*c3^2)^2 + (497*c2 + (3542*c3)/(c2 - c1*c3) + 11*c1*c2 - 497*c1*c3)^2 - 1;

I need to remove the denominator to have a linear equation, what should I do?

[Torsten]

f = f1*(c2-c1*c3)^2

[sebastiano della gatta]

thank you.

Answer 1

[Walter Roberson]

syms f1 c1 c2 c3 
eqn = f1 == (- 11*c1^2 + 2043*c1*c3 + 11*c2^2 - 2043*c2 + 11*c3^2)^2 + (497*c2 + (3542*c3)/(c2 - c1*c3) + 11*c1*c2 - 497*c1*c3)^2 - 1;
[LN, LD] = numden(lhs(eqn))

LN = 

LD = 

1

[RN, RD] = numden(rhs(eqn))

RN = 

RD = 

neweqn = simplify(LN * RD) == simplify(RN * LD)

neweqn =