A submarine is 212 feet below sea level. it rises 36 feet, and then descend 88 feet. Then, it descend another 36 feet. How far i
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Hello!
In math, there is always something called the discriminant. This is represented by the equation , when a quadratic =
. The discriminant tells you what roots an equation has. A discriminant of over 0 represents 2 real roots, a discriminant of 0 = 1 real root, and a discriminant of <0 is 0 real roots (2 complex roots)
Now, substitute in the values and solve. In this equation, a = 5, b = 2, c = 1.
Therefore, the discriminant is -16. This means that the equation has no real roots, and has 2 complex roots. Therefore, your answer is D.
Hope this helps!