Quadratic Formula

What are the solutions of 7x² + 8x + 1 = 0? Solve using the quadratic formula.

• -1, 1/7
• 1, 7
• -1, -7
• -1, -1/7

What are the solutions of 2x² - 6x + 4 = 0? Use the quadratic formula.

• 5/2, 1/2
• 2,1
• 4,2
• -1,-2

What are the solutions of 5x² + 3x = 1? Use the quadratic formula.  Round to the nearest hundredth as needed.

• 1.20, -4.20
• .24, -.84
• -1.20, 4.20
• -.24, .84

What are the solutions of x² - 10x + 14 = 0? Use the quadratic formula.  Round to the nearest hundredth as needed.

• 8.32, 1.69
• -1.69, -8.32
• -8.32, 1.69
• -1.69, -8.32

How many real number solutions does
7x² + 12x - 21 = 0 have?

• No real number solutions
• One
• Two
• Three or more

How many real number solutions does
2x² + 4x + 2 = 0 have?

• No real number solutions
• One
• Two
• Three or more