Given (a+b):(a−b)=17:1 Formula Used: a2−b2=(a−b)(a+b) Calculation (a+b):(a−b)=17:1 Let (a+b)=17x⋯(1) And (a−b)=x⋯−(2) Adding (1) and (2), we get ⇒2a=18x ⇒a=9x Put the value of a in eq.(1), we get ⇒9x+b=17x ⇒b=8x (a2−b2):(a2+b2)=[(9x)2−(8x)2]:[(9x)2+(8x)2] ⇒17x2:145x2=17:145