✨ Best Answer ✨
③-①
7a+3b+c=-1 ③'
④-②
9a+2b=0 ④'
③'-②
4a+b=-1 ③"
④'-2×③"
a=2
④'にa=2を代入
b=-9
②にa=2,b=-9を代入
c=12
①にa=2,b=-9,c=12を代入
d=1
Mathematics
Senior High
Solved
a+b+c+d=6…① 3a+2b+c=0…② 8a+4b+2c+d=5…③ 12a+4b+c=0…④
①~④の解きたいのですが、解説をお願いします。
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