Quadratic Formula

Thursday April 5, 2012

Objective: I can find solutions to a quadratic function by using the Quadratic Formula.

a

acbbx

2

42

Quadratic Formula

Quadratic Formula

This formula can be used to solve ANY quadratic equation (find x-intercepts, roots, solutions, and zeros).

The function must be in standard form

y = ax2 + bx + c

0 = ax2 + bx + c

a, b and c are the coefficients of each term.

a

acbbx

2

42

y = x2 + 3x + 2

a =

b =

c=

a

acbbx

2

42

y = x2 – 5x + 6

a =

b =

c=

a

acbbx

2

42

y = 2x2 – x – 7

a =

b =

c=

a

acbbx

2

42

y = 4x2 – 12x + 9

a =

b =

c=

a

acbbx

2

42

y = 2x2 + 6x + 5

a =

b =

c=

a

acbbx

2

42

Homework

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