Grade 9 Math Quiz Bee Elimination Rond

What is the standard form of a quadratic equation?

• y = mx + b

• y = a(x - h)² + k

• ax² + bx + c = 0

• ax² + bx = c

What is the standard form of the quadratic equation

x² -2x = 5 ?

• x² - 2x + 5 = 0

• x² +2x - 5 = 0

• x² +2x + 5 = 0

• x² -2x - 5 = 0

What is the value of "a" in the quadratic equation 7x + 1 = - x² ?

• 7

• -7

• 1

• -1

• 6 and 7

• 7 and 8

• 8 and 9

• 9 and 10

Tags

CCSS.8.NS.A.2

What are the roots / solutions of the quadratic equation x² - 10 = 15 ?

• x = + 3

• x =+ 5

• x =+ 7

• x = 0 and x = 5

Tags

CCSS.HSA-REI.B.4B

What are the factors AND solutions of x² + 2x – 3 = 0

• (x - 2)(x + 1) = 0;

  x=2, x=-1

• (x + 2)(x - 1) = 0; x=-2, x=1

• (x + 1)(x - 3) = 0; x=-1, x=3

• (x - 1)(x + 3) = 0; x=1, x=-3

Tags

CCSS.HSA-REI.B.4B

• 8

• 16

• 64

• -64

Tags

CCSS.HSA-REI.B.4B

What is the first step to solving THIS equation by completing the square? a² + 10a + 21 = 0

• Set the equation equal to zero

• Divide 10 by 2 and add the result to both sides

• Add a² and 10a together

• Subtract 21 both sides

Tags

CCSS.HSA-REI.B.4B

The graph of a quadratic function is called ____________.

• a line

• a parabola

• a hyperbola

• a cubic

Tags

CCSS.HSF-IF.C.7A

A parabola has a vertex at (-3,2). Where is the axis of symmetry?

• y = -2

• x = 3

• x = -3

• y = 2