Question

simplify (a+b+c)2 + (a-b+c)2

Answer 1

Step-by-step explanation:

(a+b+c)^2=2+2

(a+b+c)^2=4

Answer 2

Step-by-step explanation:

$a {}^{2} + b {}^{2} + c {}^{2} + 2ab + 2bc + 2ca + a {}^{2} + b {}^{2} + c {}^{2} - 2ab - 2bc + 2ca$

$2a {}^{2} + 2b {}^{2} + 2c {}^{2} + 4ca$