5x-1/2x²＝50×1/4
10x-x²＝50×1/4×2
10x-x²＝25
x²-10x+25＝0
(x-5)²＝0
∴x＝5
50×1/4×2
＝50×1/2
＝25
ありがとうございます！
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5x-1/2x²＝50×1/4
10x-x²＝50×1/4×2
10x-x²＝25
x²-10x+25＝0
(x-5)²＝0
∴x＝5
50×1/4×2
＝50×1/2
＝25
ありがとうございます！
Users viewing this question
are also looking at these questions 😉
ありがとうございます！
なぜ25になるんですか？
すいません┏●