Mathematics
Senior High
Resolved
(3)で、なぜ➕1されているのですか?
7 1)(a+b)
=α+4a'b+6a*b
+ab+b
(2)(x+y
=x"+5x°y+10xy
+10x°y+5xy°+y
(3)(a+1"=a®+ 6a".1+15a4.13
1
2
1
11
3
3
11
46
4.1
15 10 10 5 1
16 15 20 15 6 1
+20.19+15a".14+6a-15+16
=+6c+15a+20g°+15g*+6«+1
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