1. 4-4 Factoring Quadratic Expressions
BY: TUCKER, TANNER, TRISTON

2. Factoring a Perfect Square Trinomial
 64x2 - 16x + 1 Is the first term a perfect square?
Is the last term a perfect square?
Is the middle term twice the product of 8 and 1? YES
(8x)2 1 (8x - 1)2
Check your Self FOIL
(8x-1) (8x-1)
(8x)2 - 8x - 8x +(-1)-1
64x2 -16x +1

3. Factoring a Difference of Two Squares
 25x2 - 49
Find your perfect squares
 25x2-49 = (5x)2 - 72
= (5x + 7) (5x – 7)
= 25x2 - 49

4. Got It?
 Try Got It #5.
• 16x2 - 81

5. Work on
 Page 221 #50 - 58