Question

If a? - b2 = 36 and a-b = 12 then average of
'a' and 'b'is?
A. 3
B. 12
С.
D. 3/2​

Answer 1

Answer:

(a²-b²)=36 and( a-b)=12

=>(a+b)(a-b)=36

=>(a+b)=36/(a-b)

=>(a+b)=36/12 {putting the value of (a-b)=12}

=>(a+b)=3

The average of a&b is (a+b)/2

That is 3/2 ( we have found the value of a+b above . And we just put the value and found the answer)