Mathematics
Junior High
Resolved
(7).(8)の解き方教えてください😭🙏🏻
(6) 9x²=5
9 r²-5/1
=
x=+₁
x=+
(7) 2x²-24=0
2x²=24
x²=12
√5
3
x==√12
x=+2√3
(8) 4x²-7=0
> 4x²=7
x² =
7
4
x=+₁
+√7
x=147
2
x=±.
(9) 5x2–18=0
9 5r=18, r=5,
18
Đ
5'
18
-+√/15+3/2+3/10
=
x=+√5
3
=
x=±2√3
x=±
x=+
17.
2
3/10
5
Answers
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