Question

solve in one word
$(a + b + c) {?}^{2}$
​

Answer 1

Step-by-step explanation:

(a + b + c)²

= (a + b + c) × (a + b + c)

= (a² + ab + ac + ab + b² + bc + ac + bc + c²)

= (a² + b² + c² + 2ab + 2bc + 2 ac)

= [a² + b² + c² + 2(ab + bc + ac)]