# Question: How do I solve this equation?

December 25 2012 by
false
Maple 15

0

I want to solve the equation f(f(-1))=sqrt(2)+g(f(2)), where
f:=x->a/x^2-3*x+2 and g:=x->a*sin(2*x), a is an unknow. I tried
restart:f:=x->a/x^2-3*x+2:g:=x->a*sin(2*x):solve(f(f(-1))=sqrt(2)+g(f(2)),a):evalf(%);
and receive 13.02210936+4.135282756*I. This is a complex solution. I know that, the equation has a real number is -5.81218. How can I get this real solution?