Does every positive real number have both a positive and negative cube root?

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 + 4x + 5 = 0