Download Informal Geometry Period 1

CCGPS Geometry
Day 45 (10-15-13)
UNIT QUESTION: How are real
life scenarios represented by
quadratic functions?
Today’s QuesTion:
For polynomials, how is
factoring related to
multiplying?
Standard: MCC9-12.A.SSE.3a
Sign Rule:
 When
 The
the last term is POSITIVE…
signs inside the parenthesis will
be the SAME as the middle
number’s sign
Figuring out the Numbers
 Check
to see…
What multiplies to give you the last
number AND adds to give you the
middle number?
2
x
+7x + 6
( x + 6 )( x + 1 )
For polynomials, how is factoring related to multiplying?
2
x
+ 9x + 14
( x + 7 )( x + 2 )
For polynomials, how is factoring related to multiplying?
2
x
– 6x + 8
( x – 4 )( x – 2 )
For polynomials, how is factoring related to multiplying?
2
x
– 10x + 16
( x – 8 )( x – 2 )
For polynomials, how is factoring related to multiplying?
Sometimes you
can factor out a
st
GCF 1 !
2
2x
– 16x + 24
2
2(x
– 8x +12)
2( x – 6)( x – 2)
For polynomials, how is factoring related to multiplying?
3y2 + 36y + 60
3(y +10)(y +2)
2
4x
+24x + 32
4(x + 2)(x + 4)
For polynomials, how is factoring related to multiplying?
Sign Rule:
 When
 The
the last term is NEGATIVE…
parenthesis will have
DIFFERENT SIGNS.
 The larger factor will have the
SAME sign as the middle number
2
n
+ 2n – 48
( n + 8 )( n – 6 )
For polynomials, how is factoring related to multiplying?
2
x
+ 8x – 20
(x + 10)( x – 2 )
For polynomials, how is factoring related to multiplying?
2
x
– 4x – 21
(x + 3 )( x – 7 )
For polynomials, how is factoring related to multiplying?
2
x
– 9x – 36
(x + 3 )( x – 12 )
For polynomials, how is factoring related to multiplying?