Science
Junior High
答えの24にたどり着けません解説お願いしますm(_ _)m
x+y=8
xy=10のとき
2² - 2xy + y² n 12 te ik on to
(x−y) ²³/1²= x² <2xy + y²
2
(x-y)² - xy = x² - 2xy + y² - xy
x² = +xy ty²
(x² - y)² - xy
tul
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