Quadratic EquationsQuadratic Formula

Quadratic FormulaO The Quadratic Formula can be used for any quadratic equation.O You do not have to memorize it, just always know where to find it.O Be careful with the numbers and make sure you put them in the right place.O ax2 + bx + c = 0

Quadratic FormulaO Let’s start with an easy

one.

O x2 + 3x + 2 = 0

O x = -1 and x = -2

a = 1b = 3c = 2

Plug in the numbers.

Take care of the numbers under the radical.

Then solve.

Quadratic FormulaO Try another one.

O x2 - 5x + 2 = 0

O x = and x =

a = 1b = -5c = 2

Plug in the numbers.

Take care of the numbers under the radical.

Then solve.

Quadratic FormulaO And again…..

O 2x2 - 4x - 3 = 0

O x =

a = 2b = -4c = -3

Plug in the numbers.

Take care of the numbers under the radical.

Then solve.

Quadratic FormulaO And again….

O 6x2 + 2x + 4 = 0

O x =

a = 6b = 2c = 4

Plug in the numbers.

Take care of the numbers under the radical.

Then solve.

Quadratic FormulaO Work these out in your notes!O 1. x2 + 3x – 4 = 0

O 2. 2x2 – 7x – 8 = 0

O 3. -2x2 + 3x – 4 = 0

O 4. x2 – 5x + 5 = 0

O 5. 5x2 – 15x – 17 = 0