A+b+c=9,ab+bc+ca=23 asquare+bsquare+csquare?
Answers
Answered by
2
Answer:
(a+b+c)² = a²+b²+c²+2(ab+bc+ac)
=> 9² = a²+b²+c²+2(23)
=> 81 = a²+b²+c² + 46
=> a²+b²+c² = 81-46
=> a²+b²+c² = 35
Similar questions