The product of two positive numbers is 24, and the sum of their squares is 73. What is the square of their difference?
xy = 24
x^2 + y^2 = 73
now: ( x-y)^2 = ( x^2 + y^2 ) - 2xy sub in the values above
= 73 - 2(24) = 25
The question doesn't ask for it,
but the two positive numbers are 3 and 8.