Question

if a + b + C is equal to -1 and a b + BC + CA is equal to 4 then find the value of a square + b square + c square

Answer 1

Step-by-step explanation:

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

=> (-1)² = a² + b² + c² +2(ab+ac+bc)

=> 1 = a² + b² + c² + 2(4)

=>a²+b²+c² = -7

Answer 2

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