On Line Exam

Find x

(A) 12

(B) 1

(C) 13/7

(D) 5/12

(E) 12/5

Solve x^2/3 + x^1/3 = 6

(A) S = {8, 27}
(B) S = {-8, 27}
(C) S = {-8, -27}
(D) S = {8, -27}
(E) S = {}

What is the sum of all solutions of x³ + 4x² – x – 4 = 0?

(A) 4.
(B) 2.
(C) -1.
(D) -4.
(E) 1.

The real solution of the equation

2(x – 2)(x² + 2) = –4(x² + 2)

(A) Is an even number.
(B) Is an odd number.
(C) Is a prime number.
(D) Is an irrational number.
(E) Is a negative number.

The biggest real number that satisfies the equation x³ + 4x² – x – 4 = 0 is:

(A) 4.
(B) 2.
(C) -1.
(D) -4.
(E) 1.