If your perfect square is rigth you're almost done if is real. Because you have the sum of two squared quantities equal to zero, both shall be zero.
Wolframalpha says solve 4*x*sin(w*x)-x^2-4=0 - Wolfram|Alpha
If your perfect square is rigth you're almost done if is real. Because you have the sum of two squared quantities equal to zero, both shall be zero.
Wolframalpha says solve 4*x*sin(w*x)-x^2-4=0 - Wolfram|Alpha