Warm Up  1.) What is the vertex of the graph with the equation y = 3(x – 4) 2 + 5?  2.) What are the x-intercepts of the graph with the equation y= -2(x – 2)(x + 5)

4.2 part 2

Objective  Change between intercept form and standard form using FOIL method  Change between vertex form and standard form using FOIL method

FOIL method  To multiply two expressions that each contain two terms add the products of:  First terms  Outside terms  Inside terms  Last terms

Example 5 – Change from intercept to standard form  Write y = 3(x – 4)(x + 6) in standard form.

Example 6 – Change from vertex form to standard form

Assignment  Pg. 249 (24 – 32 all)

Warm Up

 Factor.  1.) x 2 – 3x – 18  2.) r 2 + 2r – 63  3.) 5x 2 – 17x + 6

Warm Up  Solve by factoring.  1.) x 2 – 8x + 12 = 0  2.) x 2 + 2x – 35 = 0  3.) 15x 2 + 7x – 2 = 0