Homework # 2 - Math 149
The problems on this homework must be done alone. The honor code is in effect.
First name: Last name:
1. The solution to the equation \(x^3 - 3x^2 = 4x\) is
a. \(x = 0, 4\)
b. \(x = -1, 0, 1\)
c. \(x = -1, 0 , 4\)
d. \(-1 \leq x \leq 1\)
e. \(x = 4\)
2. The solution to the equation \(x^2 - 4 = 2x\) is
a. \(x = 2, 4\)
b. \(x = 1+\sqrt{20}, x = 1-\sqrt{20}\)
c. \(x = 1+\sqrt{5}, x = 1-\sqrt{5}\)
d. \(x = 1+\sqrt{3}i, x = 1-\sqrt{3}i\)
e. No solutions
3. The solution to the inequality \(x^2 + 2 < x\) is
a. \(x = 1+\sqrt{7}, x=1-\sqrt{7}\)
b. \(x = 1+\sqrt{5}, x=1-\sqrt{5}\)
c. \(x = \frac{1+\sqrt{7}}{2}, x=\frac{1-\sqrt{7}}{2}\)
d. \(\frac{1+\sqrt{5}}{2}, x=\frac{1-\sqrt{5}}{2}\)
4. The solution to the inequality \(x^2 \geq 2x + 3\) is
a. \(x \geq 3\)
b. \(x \geq 3\) or \(x \leq -1\)
c. \(x \geq 3\) or \(x \geq -1\)
d. \( -1 \leq x \leq 3\)
e. \(x \leq -1\) and \(x \leq 3\)
5. Solve \(x^3 = x\).
a. \(x=-1, x = 1\)
b. \(x = -1, x = 0, x = 1\)
c. \(x = -1, x= 0, x = 1, x = 2\)
d. \(x = 1\)
e. no solutions