Question

pls ans step by step

Answer 1

$(2x + \binom{2}{3} y - z)(2x - \binom{2}{3} y + z \\ 2x {}^{2} - \binom{2}{3} {}^{2} - z { }^{2} \\ 4x {}^{2} + \binom{6}{9} {}^{2} - z {}^{2}$
hope this helps u