Mathematics
Junior High
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青が答えです
なぜ(𝐗-y)²になるのですか?
5 x=√5+3,y=3のとき,x²-2xy+yの値を求めなさい。
(15+3)(+3)-2×15+3)×3+9
x22xy+y2
(5点)<
15+315+315+9-215+9+9
=561+3051315-205+9+9+9
=57i+45+27
=(x-y)2
2
(15+3-372
=
(ひ5)2
=5
(5万+405+27
54
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