1 Expert Answer
Mark M. answered • 11/02/22
Tutor
4.9
(954)
Retired college math professor. Extensive tutoring experience.
x2 + 8x + 20 = 0
x = [-8 ± √(82 - 4(1)(20))] / (2(1)) = (-8 ± √√(-16)) / 2 = (-8 ± 4i) / 2 = -4 ± 2i
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Peter R.
11/02/22