Mathematics
Senior High
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(ii)の問題の解き方を教えてください🙏
(4) x+y=2, x2 + v2=6のとき,
(i) xy の値は,
- (x + y)² - 2xy
である.
3
である.
y
+
3
XC
の値は,
6
4-2xy=6-4
-2x1=2
xy=
キ
ク
Lai
!
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