Question

simplify (a+b+c)²+(a-b-c)².​

Answer 1

Answer:

2(a²+b²+c²+2bc)

Step-by-step explanation:

• (a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ca
• (a-b-c)²=a²+b²+c²-2ab+2bc+2ac

so, (a+b+c)²+(a-b-c)²

a² + b² + c² + 2ab + 2bc + 2ca + a²+b²+c²-2ab+2bc-2ac

a²+a²+b²+b²+c²+c²+2ab-2ab+2bc+2bc+2ac-2ac

2a²+2b²+2c²+4bc

2(a²+b²+c²+2bc)