2010 · Q18
If (a – b): (a +b) = 1:5, then what is (a2 -b2): (a2 + b2) equal to?
Elementary MathematicsAlgebra
- A2:3
- B3:2
- C5 : 13
- D13 : 5
Explanation
(a-b)/(a+b)=1/5 gives a/b=3/2; (a²-b²)/(a²+b²)=5/13.
If (a – b): (a +b) = 1:5, then what is (a2 -b2): (a2 + b2) equal to?
Explanation
(a-b)/(a+b)=1/5 gives a/b=3/2; (a²-b²)/(a²+b²)=5/13.