If `(a-b):(a+b)=1/5`,find the value of `(a^2-b^2):(a^2+b^2):

If a-b=5 and a b=12 , find the value of a^2+b^2

If a+b=7 and a b=12 , find the value of (a^2-a b+b^2)

If a+b=7 and a b=12 , find the value of (a^2-a b+b^2)

If a : b=2:5, . find the value of (3a+2b)/(4a+b)

Find the value of 2a^2+b^2+5 when a=2 and b=-1

If a+b=10\ \ a n d\ \ \ a b=16 , find the value of a^2-a b+b^2\ a n d\ \ a^2+a b+b^2

If a=2 and b=-2, find the value of : (i) a^(2)+b^(2) (ii) a^(2)+ab+b^(2) (iii) a^(2)-b^(2)

If (2a)/b =1/2 , what is the value of b/a ?

If a+b+c=9 and a b+b c+c a=23 , find the value of a^2+b^2+c^2

If the range of the function f(x)= cot^(-1)((x^(2))/(x^(2)+1)) is (a, b), find the value of ((b)/(a)+2) .