If m : n = 5 : 4 then what is the value of (m2 + n2) : (m2 − n2) ?

16 : 9 25 : 9 32 : 5 41 : 9

41 : 9

If m : n = 5 : 4 then what is the value of (m2 + n2) : (m2 − n2) ? Put the value of m and n in the required equation, (m2 + n2) : (m2 − n2) = (52 + 42) : (52 − 42) = (25 + 16 ) : (25 - 16) = 41  : 9