Quadratic Formula and the Discriminant

This equation is in standard form.
5x² - 6x + 7 = 2

• True
• False

This equation is in standard form.
2x² + x - 11 = 0

• True
• False

This equation is in standard form.
x² + 15 - 4x = 0

• True
• False

What step would put this equation in standard form?
14 = 10x² + 6x

• Divide both sides by 2
• Add 14 to both sides
• Subtract 14 from both sides
• Take the square root of both sides.

Use the equation to identify a, b, and c.
3x² -6x + 11 = 0

• 3, 6, and 11
• 3, -6, and -11
• 3x², -6x, and 11
• 3, -6, and 11

Use the equation to identify a, b, and c.
x² - 7x + 5 = 15

• 1, -7, and 5
• 1, -7, and 20
• 1, -7, and -10
• x, -7, and 5

Use the equation to identify a, b, and c.
4x² = 8x - 9

• 4, 8, and -9
• 4, -8, and 9
• -4, -8, and 9
• 4, -8, and -9

Evaluate b² - 4ac for the equation
2x² - 3x + 1 = 0

• 1
• -17
• 17
• √6

Tags

CCSS.HSA-REI.B.4B

Evaluate b² - 4ac for the equation
x² - 5x - 3 = 0

• 13
• -13
• 37
• 2

Tags

CCSS.HSA-REI.B.4B

Evaluate b² - 4ac for the equation
x² - 7x - 2 = 4

• 25
• 73
• -25
• 10

Tags

CCSS.HSA-REI.B.4B