Question

Expand
(2x+y-z)square​

Answer 1

${(2x + y - z)}^{2} \\ \\ we \: know \\ {(a + b + c)}^{2} = {a}^{2} + {b}^{2} + {c}^{2} + 2ab + 2bc + 2ca \\ \\ so \\ {(2x + y - z)}^{2} = \\ {(2x)}^{2} + {(y)}^{2} + {( - z)}^{2} + 2(2x)(y) + 2(y)( - z) + 2( - z)(2x) \\ \\ = 4 {x}^{2} + {y}^{2} + {z}^{2} + 4xy - 2zy - 4xz$

Answer 2

Answer:

please make it brainliest answer please please please please please please please please please please please please please please please please please please please please please please please please please please please