the average of non - zero number and its square is 5 times the number . the number is ?
"let the number be x . then , ( x + x 2 ) / 2 = 5 x = > x 2 - 9 x = 0 = > x ( x - 9 ) = 0 = > x = 0 or x = 9 so , the number is 9 . answer : a"
subtract(multiply(5, const_2), const_1)