1.

If a2 +b2 =177 and ab=54 then find the value of a+b/a-b?

Answer»

(a+b)2 =a2 +b2 +2ab=117+2*24=225 

a+b=15 

(a-b)2 =a2 +b2 -2ab=117-2*54 

a-b=3 

a+b/a-b=15/3=5



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