Question

Question #02e35

Answer 1

No real roots.

Explanation:

`y = x^2 + 8x + 18`.
Solve by the quadratic formula.
`D = d^2 = b^2 - 4ac = 64 - 72 = -8`--> `d = +-isqrt2`
Since D < 0 there are no real roots. There are 2 complex roots:
`x = -8/2 +- (isqrt2)/2 = -4 +- (isqrt2)/2`