Question 498924
Discriminate of ax^2 + bx + c is sqrt(b^2-4ac)
6^2+4*7*1>0 so 2 real roots
1^2-4*1*1<0 so 2 complex roots
16-4(3^1/2)(-7*(3^1/2))=16+4*7*3>0 so 2 real roots