Algebra 3 Review Part 3

Solve for x.
x³ -x² -4x + 4 = 0

• x = { -1, 2, -2 }
• x = { 1, 2, -2 }
• x = { 1, -1, 4 }
• x = { 1, -1, -4 }

Solve for x.
4x⁴ + 40x² - 44 = 0

• x = { 1, -1, i√11, -i√11 }
• x = { i, -i, √11, -√11 }
• x = { 1, -1, √11, -√11 }
• x = { i, -i, i√11, -i√11 }

Solve the system of equations.
y = -x² + 4x + 1
y = -x + 5

• No Solution
• (-1, 6) & (-4, 9)
• (4, 1) & (1, 4)
• (1, 4)

Solve the inequality.
3x³ - 48x < 0

• x < 4
• -4 < x < 0 or x > 4
• x < -4 or 0 < x < 4
• -4 < x < 4

Solve the inequality.
5x³ - 15x² + 12x - 36 > 0

• x < 3
• x > 3
• x < -3
• x > -3