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.
