hey4211 hey4211 09-09-2019 Mathematics contestada Given that x = 1, y = -2, z = 3, find the value of:[tex] {x}^{2} + {y}^{2} + z^{2} - 2xyz[/tex]and[tex] \frac{ {5}^{x} + 3^{z} }{y} | [/tex]please answer with methods, thanks.
