Use the digits -9 to 9 (only once) to create a real solution between 30 and 80. Show your work to justify your answer. (O+)(+O) .

Answer and Step-by-step explanation:

Sol:  The digits -9 to 9 are (-9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9)

We choose the digits -9 t0 9,

                                          = (3 + -9  i) (2 + 6  i)

                                          = 6 +18i + (-9i) 2 – 36i2

                                           = 6 + 18i – 18i -36(-1)2                              (as we know that i2=-1)

                                             =6+0+36

                                             = 42  

42 is a real solution between 30 and 80.