Question

simplify (a+b+c)² + (a-b-c)²

Answer 1

hi friend

here's your answer looking for

$( {a + b + c})^{2} + ( {a - b - c)}^{2} \\ \\ = {a}^{2} + {b}^{2} + {c}^{2} + 2ab + 2bc + 2ac + {a}^{2} + {b}^{2} + {c}^{2} - 2ab + 2bc - 2ac \\ \\ = 2 {a }^{2} + 2 {b}^{2} + 2 {c}^{2} + 4bc$
hope you are satisfied with my answer