Homework for 9-7

1
Homework for 9-7

• p. 603 4, 8, 12, 13, 16, 20, 22, 27, 28, 32, 35,
  39, 40, 50, 58, 70, 72

2
9-7 Factor Special Products

• Objectives factor using difference of two
  squares and perfect square trinomial patterns

3
Warm up your brain!

• Find the products
• (m 2)(m 2)
• m2 - 4
• (2y 3)2
• 4y2 12y 9
• (s 2t)(s 2t)
• s2 - 4t2

4
Common Squares
Number Numbers Square
1 1
2 4
3 9
4 16
5 25
6 36
7 49
8 64
9 81
10 100
11 121
12 144
Number Numbers Square
½ ¼
13 169
14 196
15 225
16 256
17 289
18 324
19 361
20 400
25 625
30 900
50 2500
5
Special Patterns

• Difference of Two Squares
• a2 b2 (a b)(a b)
• Ex 4x2 9 (2x)2 (3)2 (2x 3)(2x 3)
• Perfect Square Trinomial
• a2 2ab b2 (a b)2
• a2 2ab b2 (a b)2
• Ex x2 6x 9 x2 2(3)(x) 32 (x 3)2

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Factor using special patterns

• y2 9
• (y 3)(y 3)
• a2 - 4a 4
• (a - 2)2
• 64c2 16
• (8c 4)(8c 4) or 16(2c 1)(2c 1)
• 4n2 20n 25
• (2n 5)2

7
Find a GCF first if necessary

• 2y2 20y 50
• 2(y 5)2
• 9c2 6cd d2
• (3c d)2
• 3x2 6xy 3y2
• 3(x y)2
• -2x2 16x 32
• -2(x 4)2

8
Solving Equations with Fractions
What is the square of?
I love fractions. In fact, I love to eat ¾ of
papas ice cream!