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3.5 Polynomial of Form x2 + bx + c
Multiply Binomials
ex 1. (x + 3)(x + 7)
Tiles
box
distributive property
F.O.I.L.
ex2. (8 – b)(3 – b)
3.
(c + 3)(c – 7)
Factoring Trinomials
(x + 3)(x + 7)
= x2 + 10x
+
X
12
20
-12
35
-2
-8
7
-18
numbers
ex1.
x2 + 12x + 20
2.
a2 – 12a + 35
3.
t2 – 2t – 8
4.
y2 + 7y – 18
5.
-30 + 7m + m2
6.
-3x4 – 18x3 – 27x2
homework p166 #4,7,10,11,14,15,20
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