The difference of squares of two numbers is 180. The square of the smaller number is 8 times the larger number. Find two numbers.

Let the numbers be ‘a’ and ‘b’.


Given, difference of the squares of two numbers is 180.


a2 – b2 = 180


Also, square of the smaller number is 8 times the larger.


b2 = 8a


Thus, a2 – 8a – 180 = 0


a2 – 18a + 10a – 180 = 0


a(a – 18) + 10(a – 18) = 0


(a + 10)(a – 18) = 0


a = -10, 18


Thus, the other number is


324 – 180 = b2


b = �12


Numbers are 12, 18 or -12, 18


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