EXAMPLE:
Expand
meansa × b add a × c
= ab + ac
EXAMPLE:
Multiply out
means
p
× 2q subtract p ×
3
= 2pq – 3p
EXAMPLE:
Expand
means
n
× n add n ×
2
= n2 + 2n
EXAMPLE:
Expand
means
5n ×
2n add 5n ×
3
= 10 n2 + 15n
EXAMPLE:
Expand
means
–a ×
a and –a ×
b
= –a 2 – ab
EXAMPLE:
Multiply out
means
–b ×
b and –b ×
–c
= –b2 + bc
Lesson 9
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