If a + b + c = 0, then the value of is equal to :
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. c2.
According to the given question,
a + b + c = 0
⇒ a + b = -c
Squarying both the sides of the above equation,
⇒ (a + b)2 = (-c)2
⇒ a2 + b2 + 2ab = c2