Mathematics
Junior High
Resolved
(4)の問題 どこから「→」のところの式が出てきたのか教えて下さい🙏
C
x=-2±√7
x=4±2√2
x-3=±2√3
x=3±2√3
(4)
2(x-5)²=8
→ (5)2=4
x-5=±2
x=5±2
x=5+2 から x=7
x=5-2 から x=3
(5) 3(x-2)=24
⇒ (x-2)^2=8
x-2=±√8
x-2=±2√2
x=3±2√3
x=7, x=3
(9) 4(6.x+1
→ 4(x+1
(6x+1
6x-
オー
2方
とき, a
at.
at
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