if the sum of two numbers is 20 and the sum of their squares is 200 , then the product of the numbers is
"according to the given conditions x + y = 20 and x ^ 2 + y ^ 2 = 200 now ( x + y ) ^ 2 = x ^ 2 + y ^ 2 + 2 xy so 20 ^ 2 = 200 + 2 xy so xy = 200 / 2 = 100 answer : c"
divide(subtract(power(20, const_2), 200), const_2)