Solutions Using Quadratic Formula

What does the discriminant tell us about quadratic functions?

• The maximum or minimum

• The y-intercept

• The number and type of solutions

• The axis of symmetry

Tags

CCSS.HSA-REI.B.4B

Solve Using the Quadratic Formula 
2x² + 7x - 15 = 0

• -1.5 or 5

• No Solution

• -5 or 1.5

• 0.7 or 5

Tags

CCSS.HSA-REI.B.4B

How could you determine how many solutions that a Quad. Equation has?

• Solve to find the solutions

• Using discriminant

• Using a, b, c: the coefficients of the Quad. Equation

• You can't tell

Tags

CCSS.HSA-REI.B.4B

Solve using the quadratic formula.
2x² - 9x - 35 = 0

• x = 7/2, x = -6

• x = -5/2, x =5

• x = -3/7, x =6

• x = -5/2, x = 7

Tags

CCSS.HSA-REI.B.4B

Solve Using the Quadratic Formula
 x² + 4x - 40 = -8

• -10 & -4

• -4 & 10

• -8 & 4

• 8 & -4

Tags

CCSS.HSA-REI.B.4B

Solve using the quadratic formula. Leave your answer in exact form.

Tags

CCSS.HSA-REI.B.4B

Solve for x: 

• x = {-4, -1}

• x = {-1, -4}

• x = {2+i, 2-i}

• x = {-2+i, -2-i}

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve x^2 + 4x – 2 = 3 by using the quadratic formula.

• x = 1, –5

• x = -1, 5

• x = 2, –10

• x = 4, –8

Tags

CCSS.HSA-REI.B.4B

What is this formula?

• This is the speed of light formula.

• This is the quadratic formula.

• This is the zero product property.

• This is scary.

Tags

CCSS.HSA-REI.B.4B

Solve Using the Quadratic Formula

• -3, 4

• 3, 4

• -4, -3

• -3

Tags

CCSS.HSA-REI.B.4B