2010009605
Level:
B
Assuming \(x\in \mathbb{R}\),
solve the following algebraic equation.
\[
x^{4} -3x^{2} - 4 = 0
\]
\( \{ -2;2\} \)
\( \{ 2\} \)
\( \{ -2;-1;1;2\} \)
\( \{ -1;2\} \)
Higher degree equations and inequalities
2010009606
Level:
B
Find the solution set of the inequality.
\[ \left(4-x^2\right)\left(x^3+1\right) > 0 \]
\( (-\infty;-2)\cup(-1;2) \)
\( (-\infty;-2)\)
\( (-\infty;2) \)
\( (-\infty;-1)\cup(0;2) \)
9000019803
Level:
B
Find the solution set of the following equation.
\[
x^{4} - 5x^{2} + 4 = 0
\]
\(\left \{-2;-1;1;2\right \}\)
\(\left \{-1;1\right \}\)
\(\left \{-2;2\right \}\)
\(\left \{1;2\right \}\)
9000019804
Level:
B
Assuming \(x\in \mathbb{R}\), find the solution set of the following equation.
\[
x^{4} - 16 = 0
\]
\(\left \{-2;2\right \}\)
\(\left \{-\sqrt{2};\sqrt{2}\right \}\)
\(\left \{-4;4\right \}\)
\(\left \{-2;-\sqrt{2};\sqrt{2};2\right \}\)
9000019805
Level:
B
Assuming \(x\in \mathbb{R}\), find the solution set of the following equation.
\[
x^{4} + 2x^{2} + 1 = 0
\]
\(\emptyset \)
\(\left \{-1;1\right \}\)
\(\left \{-2;2\right \}\)
\(\left \{0\right \}\)
9000019806
Level:
B
Find the smallest integer solution of the following equation.
\[
x^{4} - 2x^{3} - x^{2} + 2x = 0
\]
\(- 1\)
\(0\)
\(1\)
\(2\)
9000019809
Level:
B
Find the factorization of the following equation.
\[
x^{3} + 3x^{2} - x - 3 = 0
\]
\(\left (x + 3\right )\left (x + 1\right )\left (x - 1\right ) = 0\)
\(\left (x - 3\right )\left (x + 1\right )\left (x - 1\right ) = 0\)
\(\left (x + 3\right )\left (x - 3\right )\left (x - 1\right ) = 0\)
\(\left (x + 3\right )\left (x - 3\right )\left (x + 1\right ) = 0\)
9000019810
Level:
B
Find the factorization of the following equation.
\[
5x^{4} - 30x^{2} + 40 = 0
\]
\(5\left (x -\sqrt{2}\right )\left (x + \sqrt{2}\right )\left (x - 2\right )\left (x + 2\right ) = 0\)
\(\left (x -\sqrt{2}\right )\left (x + \sqrt{2}\right )\left (x - 2\right )\left (x + 2\right ) = 0\)
\(5x\left (x -\sqrt{2}\right )\left (x + \sqrt{2}\right )\left (x - 2\right ) = 0\)
\(5x\left (x -\sqrt{2}\right )\left (x + \sqrt{2}\right )\left (x + 2\right ) = 0\)
9000028301
Level:
B
The following equation has a solution
\(x = 1\). Find
the sum of the remaining real solutions.
\[
x^{3} - 7x + 6 = 0
\]
\(- 1\)
\(1\)
\(0\)
\(2\)
9000028302
Level:
B
The following equation has a solution
\(x = 1\). Find
the sum of the remaining real solutions.
\[
x^{3} + 2x^{2} - x - 2 = 0
\]
\(- 3\)
\(- 1\)
\(0\)
\(2\)