Find two consecutive positive integers, sum of whose squares is 365
Solution:
Let the first number be x, then the next number will be x+1. Then, x²+(x+1)²=365 Given ⇒x²+x²+2x+1=365 ⇒2x²+2x−364=0 ⇒x²+x−182=0 ⇒x²+14x−13x−182=0 ⇒x(x+14)−13(x+14)=0 ⇒(x−13)(x+14)=0 ⇒x=13,−14 Considering positive number, the numbers are 13 and 14.