FACTORING
Factoring patterns for ax2 + bx + c = 0
Today Mean Guy
will show you how
to factor quadratics
when 'a' is 1
'a' is the coeficient of
the squared term. If a = 1
then factoring is easy.
YOU LISTEN NOW!!!
The handout will be graded
JUST FIND TWO
NUMBERS THAT
MULTIPLY AND EQUAL
'c' AND THE SAME TWO
NUMBERS HAVE TO
ADD TO EQUAL ' b'
Do this Example
Ex 1)
x2 - 11x + 18 = 0
a=
b=
c=
Title: Jan 30­8:09 AM (1 of 4)
After you get
the factors, set
each factor equal
to zero and solve
Ex 2) x2 - 9x + 18 = 0
a=
b=
c=
Ex 3) x2 -7x - 18 = 0
a=
b=
c=
Title: Jan 30­8:21 AM (2 of 4)
B4 you factor you
must get the quadratic
in standard form
Ex 4) x2 +3x = 18
a=
b=
c=
Ex 5) x2 - 4 = 0
a=
b=
c=
Title: Jan 30­8:22 AM (3 of 4)
Standard Form means
decreasing order and
equal to zero
Ex 6) x2 + 12x + 18 = 0
handout
Title: Jan 30­8:26 AM (4 of 4)
If you can't find
two numbers that
multiply and equal 'c'
and add to equal 'b'
then the quadratic is
not factorable