Question

𝟗𝟓 𝐒𝐭𝐮𝐝𝐠𝐫𝐚𝐦™

數學B3

5. 利用配方法解下列各一元二次方程式:
一7十3 x一14二0 分)

3
27下       人 7

Answer 1

✨ Jawaban Terbaik ✨

Ny-Ålesund

x^2 - 5x + 2 = 0
(x - 5/2)^2 - 25/4 + 2 = 0
(x - 5/2)^2 = 17/4
x - 5/2 = ± √17 / 2
x = 5±√17 / 2

x^2 - 70x + 1221 = 0
(x - 35)^2 - 1225 + 1221 = 0
(x - 35)^2 = 4
x - 35 = ± 2
x = 37 or 33

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