Question

Expand each of the following, using suitable identities : (2
x –
y +
z
)
2

Answer 1

2245678887754esfgbvjvvucdf

Answer 2

Answer:

$a {}^{2} + b {}^{2} + c {}^{2} = a {}^{2} + b {}^{2} + c {}^{2} \\ = 2ab + 2bc + 2ca. \\ = (4x {}^{2} + y {}^{2} + z {}^{2} - 4xz - 2yz + 4xz).$