Question

(a-c)²+b(2a-c)+(a+b+c)² решите пожалуйста​

Answer 1

$a {}^{2} - 2ac + c {}^{2} + 2ab - bc + a {}^{2} + b {}^{2} + c {}^{2} + 2ab + 2ac + 2bc = 2a {}^{2} + 2c {}^{2} + b {}^{2} + 4ab + bc$