Problema Solution
the sum of a number and 18 times its recipocal is -9 what is the number?
Answer provided by our tutors
suppose number is x
x + 18*1/x = -9
x+ 18/x = -9
x^2 + 18 = -9x
x^2 + 9x + 18 = 0
(x+6)(x+3) = 0
x = -6, -3
number can be -6, -3