Mathematics
Junior High
Resolved
これって約分できないのですか?
3
2
500
(5)2x-3=M とおくと,
1/2(2-3)2 +1/3(3-2x)=1/150
両辺に6をかけて,
3(2x-3)+2(3-2x) =1,
6
3(2x-3)-2(2x-3)-1=0,
3M2-2M-1=0,
-(-2)±√(-2)2-4×3×(-1)
2×3
2±√4+12 2±√16
M=-
300X
2±4
=
=
6
6
6
2+4
2-4
1
M=
-=1,M=
=
6
6
3
4-3
2x-3=1より,2x=4, x=2
8
2-3-13 より 2.3=1203
X=
3'
Answers
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