Question

a square + b square + c square + 2Ab + 2BC + 2ca​

Answer 1

Answer:

answer is in explanation

Step-by-step explanation:

a+b +c)² = (a+b +c)*(a+b +c)

= a*(a+b +c) + b*(a+b +c) + c*(a+b +c)

= a² + ab + ac + ab + b² + bc + ca + bc + c²

= a² + b² + c² + 2ab + 2bc + 2ca

= a² + b² + c² + 2( ab + bc + ca)