Answer:
x = ± i sqrt(5/8)
Step-by-step explanation:
8x^2+4=-1
Subtract 4 from each side
8x^2+4-4=-1-4
8x^2 = -5
Divide by 8
8/8x^2=-5/8
x^2 = -5/8
Take the square root of each side
sqrt(x^2) = ±sqrt(-5/8)
x = ±sqrt(-5/8)
x = ±sqrt(5/8) sqrt(-1)
x = ± i sqrt(5/8)
