Mathematics
Junior High
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(7)の途中式お願いします
2²-y² +10y - 25 を因数分解しなさい。
六
1
(1)
(3)
(5)
(7)
(9)
(2)
ア
I
±7
4a-6b
a² - 2a-15
(x+y=5 X x-y+5)]
7±17.
x =
8
E
(4)
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