quadratic factorising if you can long multiply you can factorise!
Post on 18-Jan-2016
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Quadratic Factorising
If you can long multiply you can factorise!
24 x 28
20 4
20
8
400 80
160 32
400
80
160
32
672
+
(20 + 4)(20 + 8)
24
28
192
480
672
8 x 24
20 x 24
480
192
x
+
1
a 4
a
8
a2 4a
8a 32
a2
4a
8a
32
a2 + 12a + 32
+
(a + 4)
(a + 8)
8a + 32
x
8(a + 4)
a(a + 4)
a2 + 4a
8a + 32
+a2 + 4a
a2 + 12a + 32
(a + 4)(a + 8)
2
(a + 4) x (a + 8)
a -4
a
8
a2 -4a
8a -32
a2
-4a
8a
-32
a2 + 4a - 32
+
(a - 4)
(a + 8)
8a - 32
x
8(a - 4)
a(a - 4)
a2 - 4a
8a - 32
+a2 - 4a
a2 + 4a - 32
(a - 4)(a + 8)
3
(a - 4) x (a + 8)
a -4
a
-8
a2 -4a
-8a +32
a2
-4a
-8a
+32
a2 -12a + 32
+
(a - 4)
(a - 8)
8a + 32
x
8(a - 4)
a(a - 4)
a2 - 4a
-8a + 32
+a2 - 4a
a2 - 12a + 32
(a - 4)(a - 8)
4
(a - 4) x (a - 8)
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