Question

as raizes f(x) = x2-11+18 são?

Answer 1

  x2-11+18 = 0

    delta = (-11)^2 - 4.1.18=121-72 = 49

   x=11+/-V49 ==>x= 11+/- 7
             2.1                    2

  x1=11+7 ==> x1 =9
            2      

x2=11-7 ==> x2 = 2
        2