What is the Equal of Equation

If a + b =12, ab =22, then (a square + b square) is equal to

  1. 188
  2. 144
  3. 34
  4. 100
Manish Listener Asked on 15th June 2015 in Maths.
Add Comment
1 Answer(s)

Answer: (4) 100
Explanation:-
Given- 
a + b = 12   and ab = 22
Then,
(a + b)2 = a2 + b2 + 2abPut the value of   a + b = 12      and ab = 22     in these equation,
122 = a2 + b2 + 2 x 22
144 = a2 + b2 + 44
a2 + b2 = 144 – 44 = 100
Hence, the answer is (4) 100.

Anurag Mishra Professor Answered on 17th June 2015.
Add Comment

Your Answer

By posting your answer, you agree to the privacy policy and terms of service.