問題一覧
1
Distributive property
a(b+c)
ab+ac
2
Difference squared
(a-b)^2
a^2-2ab+b^2
3
Sum and difference
(a+b)(a-b)
a^2-b^2
4
F O I L
(a+b)(c+d)
ac+ad+bc+bd
5
Sum squared
(a+b)^2
a^2+2ab+b^2
6
11
121
7
12
144
8
13
169
9
14
196
10
15
225
11
16
256
12
17
289
13
18
324
14
19
361
15
20
400