What values of $a$ and $b$ make this equation true?
$(4+\sqrt{-49})-2\left(\sqrt{(-4)^2}+\sqrt{-324}\right)=a+b i$
$a=$
$b=$
$(4+\sqrt{-49})-2\left(\sqrt{(-4)^2}+\sqrt{-324}\right)=a+b i$
$a=$
$b=$