Solving Quadratic Equations By FactoringChapter 5Section 2

Warm Up Factoring – Always look for the GCF

•1. 2. 3.342 xx 1492 xx 1032 xx

• 4. • 5. 372 2 xx 596 2 xx

Warm Up Factoring – Always look for the GCF

Warm Up Factoring – Always look for the GCF

• 6. • 7. 1055 2 xx 15123 2 xx

Solving Quadratic Equations by FactoringWhat it is….. What this means….

• We are not going to graph anymore…..

• But we are going to “solve” a quadratic by factoring and setting each ________ equal to zero

• Each value of ___ will give you where the parabola crosses the _________

• This is called Solving the Quadratic

• Visualize the kickoff in a football game…

• When the football is placed on the ground, and where it hits the ground again, these are called the “solutions” of the quadratic

Solving Quadratic EquationsUsing Factoring•Steps:

▫Factor the Equation▫Set equations equal to 0▫Solve for x

1832 xx

)3)(6( xx

03- xand 06 x

3 xand 6 x

Now let’s use our own work!!!!

1. Go back to the warm up problems.2. Set each problem equal to zero.3. Solve for x. These are your solutions.

Example

•Write the equation of quadratic in standard form if the solutions are x = 4, and x = -6.

On a little piece of paper

•Write the equation of a quadratic in standard form if the solutions are x = 10 and x = -4

CLASSWORK

Pg 260 # 4,5,10, 11, 12

HMWK : PG 260 # 23-28, 35-40, 47-50, 56-59, 65-70