Hey!
[tex]\\Solution:\\\\\sqrt{-25} - 4\\\\Rule~of~radicals: \sqrt{-a} = \sqrt{-1} \sqrt{a} \\Apply: \sqrt{-25} - 4 = \sqrt{-1} \sqrt{25} - 4\\\\Rule~of~imaginary~numbers: i = \sqrt{-1} \\Apply: \sqrt{-1} \sqrt{25} - 4 = 5i - 4\\\\Answer:\\5i - 4\\\\Hope~This~Helped!~Good~Luck![/tex]
