9. Calculate the real values of x and y such that (x + y)3i3 bigger than 8 10. Find real values of the number \"a\" from which ai is a solution of the polynomial equation x4 2x3 + 7x2 42 + 10 = 0. Then nd the roots of this equation. 1 1. Calculate the values of \"m\" such that the roots: x1 and x2 of x2 2131:: + m = 0 satisfy the condition x13 + x23 = xf + 17%